Digital copyright protection and transaction system based on block chain technology

Abstract

The invention relates to the field of digital copyright protection and transaction, in particular to a digital copyright protection and transaction system based on a block chain technology. The method comprises the following steps: combining a hash value of digital work content, a creation timestamp and copyright holder information to generate digital copyright information; dynamically adjusting the smart contract by using a smart contract dynamic adjustment algorithm, embedding a composite digital watermark in the digital work content, executing a transaction based on the updated smart contract, and monitoring the use condition of the digital work content; a multi-chain collaborative management mechanism is introduced, synchronization is carried out between a main chain and side chains, and loads between the main chain and the side chains are balanced. The problem that a single chain is difficult to deal with high-frequency copyright transactions and complex copyright management requirements is solved; the statically designed smart contract is difficult to adapt to rapidly changing market conditions in real time; the problems that defects exist in the aspect of preventing copyright infringement and tampering, comprehensive and effective copyright tracking and monitoring cannot be provided, and the copyright is easily removed or tampered by malicious users are solved.

Description

Technical Field

[0001] The present invention relates to the field of digital copyright protection and transaction, and in particular to a digital copyright protection and transaction system based on blockchain technology. Background Art

[0002] In the digital age, with the rapid development of the Internet and information technology, the creation and dissemination of digital works have become increasingly convenient. A large amount of digital content such as text, images, audio, and video is circulated on the Internet, and digital copyright protection and transactions have gradually become an important field. Existing digital copyright protection technologies include the use of hash functions to generate unique identifiers, digital signature technology, and blockchain technology. These technologies have initially achieved copyright protection for digital works by ensuring that copyright information cannot be tampered with and is traceable. At the same time, the development of smart contract technology has also provided an efficient and secure automated execution method for digital copyright transactions, which can achieve automatic transactions and settlements through predefined contract terms.

[0003] Although blockchain technology has shown significant advantages in digital copyright protection and transactions, it still faces some problems and challenges: First, the performance bottleneck of a single chain limits the scalability and processing capacity of the system, making it difficult to cope with high-frequency copyright transactions and complex copyright management needs; the data processing and storage capabilities of a single chain are limited. When a large amount of copyright information and transaction records pour in, congestion and delays are prone to occur, affecting user experience; second, smart contracts are usually static in design and lack a mechanism for dynamic market adjustments. It is difficult to adapt to rapidly changing market conditions in real time, resulting in the contract terms not being able to effectively reflect current market demand and supply and demand relationships; in addition, there are deficiencies in preventing copyright infringement and tampering, and it is impossible to provide comprehensive and effective copyright tracking and monitoring. It is easy to be removed or tampered by malicious users through technical means, making it difficult to play an effective role in copyright protection. Therefore, a system based on blockchain technology is needed to efficiently manage digital copyright information, dynamically adjust smart contract terms, and achieve accurate copyright watermark tracking to solve the above problems. Summary of the invention

[0004] The present invention provides a digital copyright protection and transaction system based on blockchain technology, which solves the problem that the performance bottleneck of a single chain limits the scalability and processing capacity of the system, and is difficult to cope with high-frequency copyright transactions and complex copyright management needs. When a large amount of copyright information and transaction records pour in, congestion and delays are likely to occur, affecting user experience; smart contracts are usually static in design and lack a mechanism for adjustment based on market dynamics, making it difficult to adapt to rapidly changing market conditions in real time, resulting in the inability of contract terms to effectively reflect current market demand and supply and demand relationships; there are deficiencies in preventing copyright infringement and tampering, and it is impossible to provide comprehensive and effective copyright tracking and monitoring, and it is easy to be removed or tampered with by malicious users through technical means.

[0005] The digital copyright protection and transaction system based on blockchain technology of the present invention specifically includes the following technical solutions:

[0006] The digital copyright protection and transaction method based on blockchain technology includes the following steps:

[0007] S1. The creator uploads the digital work content and provides the copyright holder information; the digital work content is converted into a hash value and the creation timestamp of the digital work content is obtained; the hash value, creation timestamp and copyright holder information of the digital work content are combined to generate digital copyright information and recorded on the blockchain main chain; the smart contract is dynamically adjusted using the smart contract dynamic adjustment algorithm to obtain an updated smart contract;

[0008] S2. Embed a composite digital watermark in the content of digital works through a composite digital watermark embedding algorithm, execute transactions based on the updated smart contract, and monitor the usage of the digital work content; introduce a multi-chain collaborative management mechanism to synchronize between the main chain and the side chain, and balance the load between the main chain and the side chain.

[0009] Preferably, the S1 specifically includes:

[0010] In the process of implementing the dynamic adjustment algorithm of the smart contract, the changes in market conditions caused by digital copyright information are collected and analyzed; based on the transaction demand and market changes in market conditions, the initial contract adjustment coefficient is calculated.

[0011] Preferably, the S1 specifically includes:

[0012] In the process of implementing the smart contract dynamic adjustment algorithm, the change rate of transaction demand and the change rate of market change are calculated based on the transaction demand and market change at the current moment and the previous moment.

[0013] Preferably, the S1 specifically includes:

[0014] Based on the initial contract adjustment coefficient, combined with the change rate of transaction demand and the change rate of market change, the contract adjustment coefficient is updated to obtain the updated contract adjustment coefficient. The formula is:

[0015] C′=C+δ(ΔT·ΔM·ln(1+ΔT 2 +ΔM 2 ))

[0016] Where C′ is the updated contract adjustment coefficient; C is the initial contract adjustment coefficient; δ is the change rate adjustment coefficient; ΔT is the change rate of transaction demand; ΔM is the change rate of market change;

[0017] The smart contract is dynamically updated based on the updated contract adjustment coefficient to obtain an updated smart contract.

[0018] Preferably, the S2 specifically includes:

[0019] Through the composite digital watermark embedding algorithm, the watermark embedding strength coefficient and the watermark embedding compensation coefficient are introduced to embed the composite digital watermark in the digital work content, and the digital work content matrix embedded with the composite digital watermark is obtained. The specific formula is as follows:

[0020]

[0021] Where W′ is the digital work content matrix embedded with the composite digital watermark; W is the original digital work content matrix; S is the copyright watermark matrix; is a composite digital watermark; λ is the watermark embedding strength coefficient; η is the watermark embedding compensation coefficient;

[0022] Extract the composite digital watermark in the content of digital works; compare the extracted composite digital watermark with the composite digital watermark when embedded, track the copyright watermark, and monitor the use of the content of digital works.

[0023] Preferably, the S2 specifically includes:

[0024] The digital work content matrix is ​​a specific storage form of the digital work content. The data of the digital work content is converted into a matrix structure for processing and operation. Based on the elements in the original digital work content matrix, the elements in the copyright watermark matrix are calculated. The formula is as follows:

[0025]

[0026] Among them, s is the element value in the copyright watermark matrix; x is the element value in the original digital work content matrix; k is the watermark embedding coefficient; θ is the sine function coefficient.

[0027] Preferably, the S2 specifically includes:

[0028] The multi-chain collaborative management mechanism adopts a dynamic load distribution algorithm to adjust and refine the load distribution coefficients of the main chain and the side chain based on the current load distribution coefficient to obtain the adjusted load distribution coefficients of the main chain and the side chain; based on the adjusted load distribution coefficients of the main chain and the side chain, the load change rate of the main chain and the side chain is calculated.

[0029] Preferably, the S2 specifically includes:

[0030] Based on the adjusted load distribution coefficients of the main chain and side chain, as well as the load change rates of the main chain and side chain, the transaction record management volume is calculated using the following formula:

[0031]

[0032] Among them, G is the transaction record management volume; P is the digital copyright information stored in the main chain, which means the collection of all digital copyright information stored in the main chain; H represents the high-frequency transaction records stored in the side chain; avg is the operation of calculating the average value; and denote the adjusted load distribution coefficients of the main chain and the side chain, respectively; is the adjustment coefficient; Δθ and Δμ represent the load change rates of the main chain and side chain, respectively;

[0033] When the transaction record management volume exceeds the set threshold, the load of the main chain and side chain will be dynamically adjusted.

[0034] Preferably, the S2 specifically includes:

[0035] When digital work content is traded, a combination of on-chain and off-chain payment methods is adopted. The on-chain part is responsible for processing and recording payment settlement information, and the actual payment operation is performed by the off-chain part. After the payment is completed, the on-chain part will record the payment completion information and update the transaction status, so that the digital copyright information on the main chain and the transaction records on the side chain remain synchronized and consistent.

[0036] The digital copyright protection and transaction system based on blockchain technology includes the following parts:

[0037] Digital copyright generation and binding module, smart contract dynamic adjustment module, copyright watermark embedding and tracking module, multi-chain collaborative management module, and on-chain and off-chain combined payment module;

[0038] The digital copyright generation and binding module converts the digital work content into a hash value, and binds the hash value of the digital work content, the creation timestamp and the copyright holder information to generate digital copyright information, and records the digital copyright information on the main chain of the blockchain; the digital copyright generation and binding module is connected to the smart contract dynamic adjustment module by means of data transmission;

[0039] The smart contract dynamic adjustment module collects and analyzes changes in market conditions caused by digital copyright information; based on the transaction demand and market change in the market conditions, calculates the contract adjustment coefficient, dynamically adjusts the smart contract terms, and obtains an updated smart contract; the smart contract dynamic adjustment module is connected to the copyright watermark embedding and tracking module by means of data transmission;

[0040] The copyright watermark embedding and tracking module embeds the composite digital watermark in the digital work content through the composite digital watermark embedding algorithm, and then executes the transaction according to the updated smart contract; extracts the composite digital watermark in the digital work content, compares the extracted composite digital watermark with the composite digital watermark at the time of embedding, and monitors the use of the digital work content; the copyright watermark embedding and tracking module is connected to the multi-chain collaborative management module through data transmission;

[0041] The multi-chain collaborative management module synchronizes the usage records and changes of the digital work content, adopts a dynamic load distribution algorithm, and obtains the transaction record management volume by real-time calculation of the load distribution coefficient and the load change rate; when the transaction record management volume exceeds the set threshold, the load of the main chain and the side chain is dynamically adjusted; the multi-chain collaborative management module is connected to the on-chain and off-chain combined payment module by means of data transmission;

[0042] The on-chain and off-chain combined payment module adopts the on-chain and off-chain combined payment method when the digital work content is traded. The on-chain part is responsible for processing and recording payment settlement information, and the actual payment operation is performed by the off-chain part; after the payment is completed, the on-chain part will record the payment completion information and update the transaction status; the on-chain and off-chain combined payment module is connected to the multi-chain collaborative management module through data transmission.

[0043] The beneficial effects of the technical solution of the present invention are:

[0044] 1. By collecting transaction demand and market changes in market conditions in real time, calculating the contract adjustment coefficient, and dynamically adjusting the smart contract, the smart contract can respond quickly to market changes, thereby improving the flexibility and efficiency of copyright transactions.

[0045] 2. Through the composite digital watermark embedding algorithm, composite digital watermark information is embedded in the content of digital works, and the use of digital work content is monitored in real time, so as to achieve full tracking and copyright protection of digital work content, and enhance the reliability and effectiveness of digital copyright protection.

[0046] 3. Through multi-chain collaborative management, the main chain stores digital copyright information to ensure the immutability and security of digital works; the side chain processes high-frequency transaction records to improve processing capabilities and speed. By dynamically adjusting the load distribution coefficient, the load of the main chain and the side chain is balanced to avoid the performance bottleneck of a single chain. By combining on-chain and off-chain payment methods, the payment settlement records are processed on the chain, and the actual payment operations are performed off-chain to ensure an efficient and secure payment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a structural diagram of the digital copyright protection and transaction system based on blockchain technology described in the present invention;

[0048] Figure 2 This is a flow chart of the digital copyright protection and transaction method based on blockchain technology described in the present invention. DETAILED DESCRIPTION

[0049] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0051] The specific scheme of the digital copyright protection and transaction system based on blockchain technology provided by the present invention is described in detail below with reference to the accompanying drawings.

[0052] See attached Figure 1 , which shows a structure diagram of a digital copyright protection and transaction system based on blockchain technology provided by an embodiment of the present invention. The system includes the following parts:

[0053] Digital copyright generation and binding module, smart contract dynamic adjustment module, copyright watermark embedding and tracking module, multi-chain collaborative management module, and on-chain and off-chain combined payment module;

[0054] The digital copyright generation and binding module converts the digital work content into a hash value, and binds the hash value of the digital work content, the creation timestamp and the copyright holder information to generate digital copyright information, and records the digital copyright information on the main chain of the blockchain; the digital copyright generation and binding module is connected to the smart contract dynamic adjustment module by means of data transmission;

[0055] The smart contract dynamic adjustment module collects and analyzes changes in market conditions caused by digital copyright information; based on the transaction demand and market change in the market conditions, calculates the contract adjustment coefficient, dynamically adjusts the smart contract terms, and obtains an updated smart contract; the smart contract dynamic adjustment module is connected to the copyright watermark embedding and tracking module by means of data transmission;

[0056] The copyright watermark embedding and tracking module embeds the composite digital watermark in the digital work content through the composite digital watermark embedding algorithm, and then executes the transaction according to the updated smart contract; regularly extracts the composite digital watermark in the digital work content, compares the extracted composite digital watermark with the composite digital watermark at the time of embedding, and monitors the use of the digital work content; the copyright watermark embedding and tracking module is connected to the multi-chain collaborative management module through data transmission;

[0057] The multi-chain collaborative management module synchronizes the usage records and changes of the digital work content, adopts a dynamic load distribution algorithm, and obtains the transaction record management volume by real-time calculation of the load distribution coefficient and the load change rate; when the transaction record management volume exceeds the set threshold, the load of the main chain and the side chain is dynamically adjusted; the multi-chain collaborative management module is connected to the on-chain and off-chain combined payment module by means of data transmission;

[0058] The on-chain and off-chain combined payment module adopts the on-chain and off-chain combined payment method when the digital work content is traded. The on-chain part is responsible for processing and recording payment settlement information, and the actual payment operation is performed by the off-chain part; after the payment is completed, the on-chain part will record the payment completion information and update the transaction status to keep the digital copyright information on the main chain and the high-frequency transaction records on the side chain synchronized and consistent; the on-chain and off-chain combined payment module is connected to the multi-chain collaborative management module through data transmission.

[0059] See attached Figure 2 , which shows a flow chart of a digital copyright protection and transaction method based on blockchain technology provided by an embodiment of the present invention, the method comprising the following steps:

[0060] S1. The creator uploads the digital work content and provides the copyright holder information; the digital work content is converted into a hash value and the creation timestamp of the digital work content is obtained; the hash value, creation timestamp and copyright holder information of the digital work content are combined to generate digital copyright information and recorded on the blockchain main chain; the smart contract is dynamically adjusted using the smart contract dynamic adjustment algorithm to obtain an updated smart contract;

[0061] The creator uploads the digital work content and provides the copyright holder information. The digital work content is the actual data of the digital work uploaded by the creator, including any digital form of creation such as text, images, audio, video, etc. The copyright holder information specifically includes name or company name, contact information, identity proof, address and copyright statement. The digital work content is converted into a hash value using a hash function. The hash value is a string of fixed length that is used to uniquely identify the digital work content. At the same time, the creation timestamp of the digital work content is obtained and recorded to ensure the accuracy of the recording time. The hash value, creation timestamp and copyright holder information of the digital work content are recorded as digital copyright information on the main chain of the blockchain; the hash function is a prior art and will not be described in detail here.

[0062] As digital copyright information is continuously added to the main chain of the blockchain, market conditions will also change; the market conditions (such as copyright prices, transaction demand, market changes, etc.) are market dynamic factors that affect copyright transactions; in order to adapt to changes in market conditions, it is necessary to use smart contract dynamic adjustment algorithms to dynamically update smart contracts.

[0063] The smart contract dynamic adjustment algorithm calculates the contract adjustment coefficient and dynamically adjusts the smart contract by collecting transaction demand and market change data in market conditions. Transaction demand and market change are obtained by statistical analysis (such as regression analysis and time series analysis). The specific processing method can be set according to the specific implementation scenario, which will not be elaborated here; transaction demand is the demand for a certain digital work content in the market, indicating the market demand for digital work content; market change indicates the degree of market volatility; the contract adjustment coefficient is a numerical value that can comprehensively reflect the current transaction demand and market change; the digital copyright protection and trading system uses the contract adjustment coefficient to dynamically adjust the specific terms of the smart contract (transaction fees and transaction time limits) to obtain an updated smart contract to adapt to changes in market conditions.

[0064] The specific implementation process of the smart contract dynamic adjustment algorithm is as follows:

[0065] First, calculate the initial contract adjustment coefficient, the formula is as follows:

[0066]

[0067] Where C is the initial contract adjustment factor; is the current transaction demand; is the current market change; α, β, γ are weight coefficients obtained through experimental tuning; ∈ is a small constant to prevent the denominator and square root from being zero, which can be set according to the specific implementation scenario;

[0068] After that, calculate the change rate of transaction demand and the change rate of market change. The specific formula is as follows:

[0069]

[0070] Among them, ΔT is the rate of change of transaction demand; ΔM is the rate of change of market change; T t is the transaction demand at time point t; T t-1 is the transaction demand at time point t-1; M t is the market change at time point t; M t-1 It is the market change at time point t-1. The digital copyright protection and trading system measures the relative changes of current transaction demand and market change through the change rate of transaction demand and the change rate of market change, so as to more accurately reflect the dynamics of market conditions;

[0071] Then, based on the initial contract adjustment coefficient, combined with the change rate of transaction demand and the change rate of market change, the contract adjustment coefficient is updated to obtain the updated contract adjustment coefficient, the formula is:

[0072] C′=C+δ(ΔT·ΔM·ln(1+ΔT 2 +ΔM 2 ))

[0073] Among them, C′ is the updated contract adjustment coefficient; δ is the change rate adjustment coefficient, which is used to control the impact of the change rate on the smart contract terms and is obtained through experimental tuning;

[0074] Finally, the smart contract is dynamically updated using the updated contract adjustment coefficient. When the updated contract adjustment coefficient increases compared to the initial contract adjustment coefficient, the transaction fee is increased to control the transaction volume, and the transaction time limit is extended to ensure transaction security. Conversely, when the updated contract adjustment coefficient decreases compared to the initial contract adjustment coefficient, the transaction fee is reduced to encourage more transactions, and the transaction time limit is shortened to improve transaction efficiency. The specific transaction fees and transaction time limits are set according to the specific implementation scenario and will not be elaborated here.

[0075] S2. Embed a composite digital watermark in the content of digital works through a composite digital watermark embedding algorithm, execute transactions based on the updated smart contract, and monitor the usage of the digital work content; introduce a multi-chain collaborative management mechanism to synchronize between the main chain and the side chain, and balance the load between the main chain and the side chain.

[0076] After the dynamic update of the smart contract is completed, the composite digital watermark is embedded in the content of the digital work through the composite digital watermark embedding algorithm, and then the composite digital watermark in the content of the digital work is extracted regularly; the extracted composite digital watermark is compared with the composite digital watermark at the time of embedding to realize copyright watermark tracking, so as to monitor the usage of the content of the digital work.

[0077] The composite digital watermark embedding algorithm introduces logarithmic and sine functions, making the embedding of composite digital watermarks more complex and covert, and difficult to detect and tamper with. The watermark embedding strength coefficient and watermark embedding compensation coefficient are introduced to ensure that the quality of the digital work content is not significantly affected while embedding the composite digital watermark, thereby improving the security, concealment and stability of the composite digital watermark.

[0078] The specific formula of the composite digital watermark embedding algorithm is as follows:

[0079]

[0080] Wherein, W′ is the digital work content matrix embedded with the composite digital watermark; W is the original digital work content matrix, which is a specific storage form of the digital work content, and converts the data of the digital work content (such as images, audio, etc.) into a matrix structure for processing and operation; S is the copyright watermark matrix; is a composite digital watermark; λ is a watermark embedding strength coefficient, which is used to adjust the embedding strength of the copyright watermark matrix S; η is a watermark embedding compensation coefficient, which is used to compensate for signal interference and ensure the quality of the digital work content after the composite digital watermark is embedded; the watermark embedding strength coefficient and the watermark embedding compensation coefficient can be set according to the specific implementation scenario;

[0081] Based on the elements in the original digital work content matrix W, the elements in the copyright watermark matrix S are calculated using the following formula:

[0082]

[0083] Among them, s is the element value in the copyright watermark matrix; x is the element value in the original digital work content matrix; k is the watermark embedding coefficient, which is used to control the shape and complexity of the composite digital watermark signal; θ is the sine function coefficient, which is used to control the influence and shape of the sine term in the composite digital watermark signal; the watermark embedding coefficient and the sine function coefficient can be set according to the specific implementation scenario.

[0084] After the composite digital watermark is embedded, the usage records and changes of the digital work content (such as transaction records, modification, expansion or watermark embedding of digital work content) are transmitted and stored between the main chain and the side chain to achieve synchronization. The multi-chain collaborative management mechanism is introduced, and the dynamic load distribution algorithm is adopted. The transaction record management volume is obtained by real-time calculation of the load distribution coefficient and the load change rate; based on the transaction record management volume, the load of the main chain and the side chain is dynamically adjusted to ensure the load balance between the main chain and the side chain. The numerical value of the transaction record management volume reflects the comprehensive load of digital copyright information and transaction records in the digital copyright protection and transaction system. The larger the value of the transaction record management volume, the more transactions and copyright management tasks are processed, and the heavier the load. The use of a dynamic load distribution algorithm helps to balance system resources, avoid overloading of a single chain, and improve the overall performance and response speed of the digital copyright protection and transaction system.

[0085] The implementation process of the dynamic load distribution algorithm is as follows:

[0086] First, based on the current load distribution coefficient, the load distribution coefficients of the main chain and the side chain are further adjusted and refined to obtain the adjusted load distribution coefficients of the main chain and the side chain. The specific formula is as follows:

[0087]

[0088] in, and They represent the current load distribution coefficients of the main chain and the side chain, i.e. the load distribution coefficients before adjustment, indicating the distribution ratio of the total load of the digital copyright protection and trading system to the main chain and the side chain; the initial load distribution coefficient is determined through experimental tuning and satisfies the constraint that the sum of the two is equal to 1; and is the load sharing factor, which is applied as the adjusted load sharing factor;

[0089] After that, the load change rate of the main chain and the side chain is calculated as follows:

[0090]

[0091]

[0092] Among them, Δθ and Δμ represent the load change rates of the main chain and side chain, respectively; is the load distribution coefficient of the main chain after adjustment at the current time t; is the load distribution coefficient of the main chain after adjustment at the previous moment; represents the load distribution coefficient of the side chain after adjustment at the current time t; is the load distribution coefficient of the side chain after adjustment at the previous moment;

[0093] Finally, based on the load distribution coefficient and load change rate, the transaction record management volume is calculated as follows:

[0094]

[0095] Among them, G is the transaction record management volume, which is a numerical value representing the overall load management volume of the digital copyright protection and transaction system; P is the digital copyright information stored in the main chain, which is the collection of all digital copyright information stored in the main chain; H represents the high-frequency transaction records stored in the side chain, which is a collection of multiple transaction data items; avg is the operation of calculating the average value; and denote the adjusted load distribution coefficients of the main chain and the side chain, respectively; is the adjustment coefficient, obtained through experimental tuning.

[0096] When the transaction record management volume exceeds a set threshold, the processing capacity of the side chain is adjusted to share the pressure of the main chain, such as increasing the computing resources and bandwidth of the side chain, or transferring part of the transaction records and data processing tasks from the main chain to the side chain. The threshold is set according to the specific implementation scenario.

[0097] When trading digital works, a combination of on-chain and off-chain payment methods is used. The on-chain part is responsible for processing and recording payment settlement information, including generating payment requests, verifying the identities of both parties to the transaction, and recording the timestamp of the payment request. The actual payment operation is performed by the off-chain part, and the funds are transferred through bank transfers, payment gateways, and other payment methods. After the payment is completed, the on-chain part will record the payment completion information and update the transaction status, so that the digital copyright information on the main chain and the high-frequency transaction records on the side chain are synchronized and consistent.

[0098] In summary, the digital copyright protection and transaction system based on blockchain technology has been completed.

[0099] The order of the embodiments of the invention is for description only and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0100] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0101] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A digital copyright protection and transaction method based on blockchain technology, characterized in that: The following steps are involved: S1. Creators upload digital content and provide copyright holder information; Convert the content of digital works into hash values ​​and obtain the creation timestamp of the content of digital works; combine the hash value, creation timestamp and copyright holder information of the content of digital works to generate digital copyright information and record it on the main blockchain; dynamically adjust the smart contract using the smart contract dynamic adjustment algorithm to obtain an updated smart contract; S2. Embed a composite digital watermark in the content of digital works through a composite digital watermark embedding algorithm, execute transactions based on the updated smart contract, and monitor the usage of the digital work content; introduce a multi-chain collaborative management mechanism to synchronize between the main chain and the side chain, and balance the load between the main chain and the side chain.

2. The digital copyright protection and transaction method based on blockchain technology according to claim 1 is characterized in that: The S1 specifically includes: In the process of implementing the dynamic adjustment algorithm of the smart contract, the changes in market conditions caused by digital copyright information are collected and analyzed; based on the transaction demand and market changes in market conditions, the initial contract adjustment coefficient is calculated.

3. The digital copyright protection and transaction method based on blockchain technology according to claim 2 is characterized in that: The S1 specifically includes: In the process of implementing the smart contract dynamic adjustment algorithm, the change rate of transaction demand and the change rate of market change are calculated based on the transaction demand and market change at the current moment and the previous moment.

4. The digital copyright protection and transaction method based on blockchain technology according to claim 3 is characterized in that: The S1 specifically includes: Based on the initial contract adjustment coefficient, combined with the change rate of transaction demand and the change rate of market change, the contract adjustment coefficient is updated to obtain the updated contract adjustment coefficient. The formula is: C′=C+δ(ΔT·ΔM·ln(1+ΔT 2 +ΔM 2 )) Where C′ is the updated contract adjustment coefficient; C is the initial contract adjustment coefficient; δ is the change rate adjustment coefficient; ΔT is the change rate of transaction demand; ΔM is the change rate of market change; The smart contract is dynamically updated based on the updated contract adjustment coefficient to obtain an updated smart contract.

5. The digital copyright protection and transaction method based on blockchain technology according to claim 1 is characterized in that: The S2 specifically includes: Through the composite digital watermark embedding algorithm, the watermark embedding strength coefficient and the watermark embedding compensation coefficient are introduced to embed the composite digital watermark in the digital work content, and the digital work content matrix embedded with the composite digital watermark is obtained. The specific formula is as follows: Where W′ is the digital work content matrix embedded with the composite digital watermark; W is the original digital work content matrix; S is the copyright watermark matrix; is a composite digital watermark; λ is the watermark embedding strength coefficient; η is the watermark embedding compensation coefficient; Extract the composite digital watermark in the content of digital works; compare the extracted composite digital watermark with the composite digital watermark when embedded, track the copyright watermark, and monitor the use of the content of digital works.

6. The digital copyright protection and transaction method based on blockchain technology according to claim 5 is characterized in that: The S2 specifically includes: The digital work content matrix is ​​a specific storage form of the digital work content. The data of the digital work content is converted into a matrix structure for processing and operation. Based on the elements in the original digital work content matrix, the elements in the copyright watermark matrix are calculated. The formula is as follows: Among them, s is the element value in the copyright watermark matrix; x is the element value in the original digital work content matrix; k is the watermark embedding coefficient; θ is the sine function coefficient.

7. The digital copyright protection and transaction method based on blockchain technology according to claim 1 is characterized in that: The S2 specifically includes: The multi-chain collaborative management mechanism adopts a dynamic load distribution algorithm to adjust and refine the load distribution coefficients of the main chain and the side chain based on the current load distribution coefficient to obtain the adjusted load distribution coefficients of the main chain and the side chain; based on the adjusted load distribution coefficients of the main chain and the side chain, the load change rate of the main chain and the side chain is calculated.

8. The digital copyright protection and transaction method based on blockchain technology according to claim 7 is characterized in that: The S2 specifically includes: Based on the adjusted load distribution coefficients of the main chain and side chain, as well as the load change rates of the main chain and side chain, the transaction record management volume is calculated using the following formula: Among them, G is the transaction record management volume; P is the digital copyright information stored in the main chain, which means the collection of all digital copyright information stored in the main chain; H represents the high-frequency transaction records stored in the side chain; avg is the operation of calculating the average value; and denote the adjusted load distribution coefficients of the main chain and the side chain, respectively; is the adjustment coefficient; Δθ and Δμ represent the load change rates of the main chain and side chain, respectively; When the transaction record management volume exceeds the set threshold, the load of the main chain and side chain will be dynamically adjusted.

9. The digital copyright protection and transaction method based on blockchain technology according to claim 8 is characterized in that: The S2 specifically includes: When digital work content is traded, a combination of on-chain and off-chain payment methods is adopted. The on-chain part is responsible for processing and recording payment settlement information, and the actual payment operation is performed by the off-chain part. After the payment is completed, the on-chain part will record the payment completion information and update the transaction status, so that the digital copyright information on the main chain and the transaction records on the side chain remain synchronized and consistent.

10. A digital copyright protection and transaction system based on blockchain technology, applied to the digital copyright protection and transaction method based on blockchain technology as claimed in claim 1, characterized in that: Includes the following sections: Digital copyright generation and binding module, smart contract dynamic adjustment module, copyright watermark embedding and tracking module, multi-chain collaborative management module, and on-chain and off-chain combined payment module; The digital copyright generation and binding module converts the digital work content into a hash value, and binds the hash value of the digital work content, the creation timestamp and the copyright holder information to generate digital copyright information, and records the digital copyright information on the main chain of the blockchain; the digital copyright generation and binding module is connected to the smart contract dynamic adjustment module by means of data transmission; The smart contract dynamic adjustment module collects and analyzes changes in market conditions caused by digital copyright information; based on the transaction demand and market change in the market conditions, calculates the contract adjustment coefficient, dynamically adjusts the smart contract terms, and obtains an updated smart contract; the smart contract dynamic adjustment module is connected to the copyright watermark embedding and tracking module by means of data transmission; The copyright watermark embedding and tracking module embeds the composite digital watermark in the digital work content through the composite digital watermark embedding algorithm, and then executes the transaction according to the updated smart contract; extracts the composite digital watermark in the digital work content, compares the extracted composite digital watermark with the composite digital watermark at the time of embedding, and monitors the use of the digital work content; the copyright watermark embedding and tracking module is connected to the multi-chain collaborative management module through data transmission; The multi-chain collaborative management module synchronizes the usage records and changes of the digital work content, adopts a dynamic load distribution algorithm, and obtains the transaction record management volume by real-time calculation of the load distribution coefficient and the load change rate; when the transaction record management volume exceeds the set threshold, the load of the main chain and the side chain is dynamically adjusted; the multi-chain collaborative management module is connected to the on-chain and off-chain combined payment module by means of data transmission; The on-chain and off-chain combined payment module adopts the on-chain and off-chain combined payment method when the digital work content is traded. The on-chain part is responsible for processing and recording payment settlement information, and the actual payment operation is performed by the off-chain part; after the payment is completed, the on-chain part will record the payment completion information and update the transaction status; the on-chain and off-chain combined payment module is connected to the multi-chain collaborative management module through data transmission.

Images