Information processing device, information processing method, and program

Abstract

To provide a technique capable of distributing profits on sales of digital contents among a plurality of users.SOLUTION: An information processing device comprises: a storage unit which stores information on a content; a management unit which manages a user who owns the content, a group which has created the content, and a plurality of users included in the group; a buying and selling processing unit which handles the buying and selling of the content; and a distribution processing unit which distributes an amount of money to be paid when transferring the content to the plurality of users on the basis of a group contribution level associated with the group and user contribution levels associated with each of the plurality of users when receiving an instruction to transfer the ownership of the content.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an information processing device, an information processing method, and a program. [Background technology]

[0002] Currently, for digital content that is easily copied, such as digital images, ownership is verified using non-fungible tokens (NFTs) issued on a blockchain. Patent Document 1 discloses a technology for managing digital content using NFTs. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7043672 Summary of the Invention [Problem to be solved by the invention]

[0004] Currently, digital content with NFTs attached is traded on online markets. In addition, digital content is often produced jointly by multiple users (creators). Therefore, in order to stimulate digital content trading, it is considered important to have a system that allows users who jointly create digital content to receive appropriate compensation. Note that such a system is not limited to digital content with NFTs attached, but is considered important for digital content trading in general.

[0005] Therefore, an object of the present invention is to provide a technique that enables profits from the sale of digital content to be shared among multiple users. [Means for solving the problem]

[0006] An information processing device according to one aspect of the present invention has a memory unit that stores information relating to content, a management unit that manages users who own the content, groups that created the content, and multiple users included in the groups, a buying and selling processing unit that buys and sells content, and a distribution processing unit that, when instructed to transfer ownership of the content, distributes the amount paid when transferring the content to multiple users based on the group contribution associated with the group and the user contribution associated with each of the multiple users. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a technique that enables profits from the sale of digital content to be shared among multiple users. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating an example of a system configuration of a content trading system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram illustrating an example of the hardware configuration of a transaction management server. [Figure 3] FIG. 2 is a diagram illustrating an example of a functional block configuration of a transaction management server. [Figure 4] FIG. 1 is a diagram illustrating an example of the configuration of a smart contract. [Figure 5] FIG. 10 is a sequence diagram illustrating an example of a processing procedure when creating a group account. [Figure 6] FIG. 10 is a sequence diagram showing an example of a processing procedure when selling digital content in a market. [Figure 7] FIG. 10 is a sequence diagram showing an example of a processing procedure when digital content is sold in a market. [Figure 8] FIG. 10 is a sequence diagram illustrating an example of a processing procedure when creating a group account. [Figure 9] FIG. 10 is a sequence diagram showing an example of a processing procedure when selling digital content in a market. [Figure 10]FIG. 10 is a sequence diagram showing an example of a processing procedure when digital content is sold in a market. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings, in which the same reference numerals denote the same or similar components.

[0010] <System configuration> 1 is a diagram showing an example of the system configuration of a content trading system 1 according to this embodiment. The content trading system 1 includes a trading management server 10, a terminal 20, an information server 30, a blockchain network 40, and a content management server 60. The trading management server 10, the terminal 20, the information server 30, the blockchain network 40, and the content management server 60 are connected to a communication network N and can communicate with each other.

[0011] The content trading system 1 is a system that enables the buying and selling of digital content (which may simply be referred to as content) created by users (creators), such as photographs and digital art. Digital content includes, for example, images, videos, music, text data, and the like. In this embodiment, the content trading system 1 may be a system that enables the buying and selling of digital content using a blockchain, or may be a system that enables the buying and selling of digital content without using a blockchain.

[0012] The transaction management server 10 is a device that provides a marketplace over the Internet that enables users to buy and sell digital content. Taking into consideration the case where multiple users jointly create digital content, the transaction management server 10 manages multiple users as a group that creates digital content.

[0013] Furthermore, digital content jointly created by multiple users is displayed together with the price on a market provided by the transaction management server 10. A user who wishes to purchase digital content can purchase the desired digital content by paying any amount or the amount displayed on the market.

[0014] When multiple users belonging to the same group jointly create digital content, it is desirable that the profits from the sale of that digital content be shared among the multiple users. Therefore, the transaction management server 10 manages the group that created the digital content in association with the digital content, and when the digital content is purchased, the profits from the sale are automatically shared among the multiple users in the group.

[0015] When buying and selling digital content using blockchain, the transaction management server 10 realizes the buying and selling of digital content by providing a market where NFTs associated with digital content stored in the content management server 60 can be bought and sold. On the other hand, when buying and selling digital content without using blockchain, the transaction management server 10 stores the owner of the digital content stored in the transaction management server 10 itself or the content management server 60 in a database or the like. In addition, the transaction management server 10 sells digital content on the market, and when the digital content is purchased, changes the owner in the database, thereby realizing the buying and selling of the digital content.

[0016] The terminal 20 is a terminal used by a user who uses the market provided by the transaction management server 10. The terminal 20 can be any terminal equipped with a communication function, such as a smartphone, tablet terminal, mobile phone, personal computer (PC), or laptop PC.

[0017] The information server 30 is a device that provides various types of information available on the Internet to the transaction management server 10 and the blockchain network 40. When providing information to the blockchain network 40, the information server 30 may be a server that provides a service called an "oracle," or may be a server independently provided by the company that provides the transaction management server 10. An oracle is a mechanism for providing information that cannot be determined or obtained on a blockchain, such as real-world information, to a smart contract.

[0018] The blockchain network 40 is a distributed computing network in which multiple computers participating in the blockchain network 40 are connected via P2P (Peer to Peer), and each of the multiple computers that accepts a transaction verifies the legitimacy of the transaction and records only legitimate transactions in a ledger in units called blocks. Note that if buying and selling of digital content is realized without using a blockchain, the content trading system 1 does not need to include the blockchain network 40.

[0019] The blockchain network 40 allows the execution of a program called a smart contract 50. The smart contract 50 refers to a program executed by multiple computers participating in the blockchain network 40. The transaction management server 10 issues a transaction to call a method included in the smart contract 50, thereby causing multiple computers participating in the blockchain network 40 to execute the specified method.

[0020] NFTs are realized by smart contracts 50. Unlike fungible tokens (FTs) such as Bitcoin, NFTs have an identifier (hereinafter referred to as a "token ID") that allows them to be distinguished from other NFTs. Since the token ID is different for each token, each NFT is a token that exists only once in the world.

[0021] The content management server 60 is a server that manages actual data of digital content. Note that the actual data of digital content may be managed by the transaction management server 10 instead of the content management server 60.

[0022] <Hardware configuration> 2 is a diagram showing an example of the hardware configuration of the transaction management server 10. The transaction management server 10 has a processor 11 such as a CPU (Central Processing Unit) or GPU (Graphical Processing Unit), a memory (e.g., RAM (Random Access Memory) or ROM (Read Only Memory)), a storage device 12 such as an HDD (Hard Disk Drive) and / or SSD (Solid State Drive), a network IF (Network Interface) 13 for wired or wireless communication, an input device 14 for accepting input operations, and an output device 15 for outputting information. The input device 14 is, for example, a keyboard, a touch panel, a mouse, and / or a microphone. The output device 15 is, for example, a display, a touch panel, and / or a speaker.

[0023] The transaction management server 10 may be configured from one or more physical servers, or may be configured using a virtual server running on a hypervisor, or may be configured using a cloud server.

[0024] <Function block configuration> FIG. 3 is a diagram illustrating an example of the functional block configuration of transaction management server 10. Transaction management server 10 includes memory unit 100, management unit 101, trade processing unit 102, and distribution processing unit 103. Memory unit 100 can be implemented using memory device 12 included in transaction management server 10. Furthermore, management unit 101, trade processing unit 102, and distribution processing unit 103 can be implemented by processor 11 of transaction management server 10 executing a program stored in memory device 12. Furthermore, the program can be stored in a storage medium. The storage medium storing the program may be a non-transitory computer-readable medium. The non-transitory storage medium is not particularly limited, and may be, for example, a storage medium such as a universal serial bus (USB) memory or a compact disc read-only memory (CD-ROM).

[0025] The storage unit 100 includes an account management DB 100a and a content management DB 100b. The account management DB 100a is a database for managing group accounts and user accounts. A group account includes a group name, an identifier (group ID) that uniquely identifies the group, and user identifiers (user IDs) of multiple users belonging to the same group. A user account includes a user name, a user ID, the amount of currency held by the user, and the group ID of the group to which the user belongs. In other words, the account management DB 100a associates each account of multiple users with an account of a group. A user account may also include information (which may be referred to as a wallet) for managing the currency and the amount of currency held by the user. When buying and selling digital content using a blockchain, the information (wallet) may include a wallet address (the user's public key itself or an address generated from the public key) and the user's private key, which are required when the user uses the blockchain network 40.

[0026] The content management DB 100b is a database for managing digital content created by users. Information about digital content is stored in the content management DB 100b in association with the user ID of the user who created the digital content or the group ID of the group who created the digital content. The information about digital content is, for example, the actual data of the digital content or the URI (Uniform Resource Identifier) ​​of the content management server 60 where the actual data of the digital content is stored.

[0027] The management unit 101 manages users who own digital content, groups that have created the digital content, and multiple users included in the groups. The management unit 101 may also manage groups by using the account management DB 100a to associate the accounts of multiple users with the accounts of the group.

[0028] Furthermore, when using a blockchain to realize the buying and selling of digital content, the management unit 101 may deploy a contract that realizes a multi-signature wallet to the blockchain network 40. Furthermore, the management unit 101 may register the wallet addresses of multiple users belonging to a group as owners (co-owners) of the multi-signature wallet in the multi-signature wallet. A multi-signature wallet is a wallet that requires signatures using multiple private keys when issuing a transaction to the blockchain network 40. By using a multi-signature wallet, when issuing a transaction as a group, signatures from multiple users belonging to the group are required, thereby making it possible to improve security. Furthermore, by using a multi-signature wallet, it is possible to emphasize that ownership of digital content resides with the group.

[0029] The trading processing unit 102 performs various processes realized in the market, such as the trading of digital content.

[0030] When the distribution processing unit 103 receives an instruction to transfer ownership of digital content from the user who currently owns it to the user who purchased the digital content, the distribution processing unit 103 distributes the amount paid by the user who purchased the digital content when the digital content is transferred to multiple users based on the group contribution associated with the group and the user contribution associated with each of the multiple users belonging to the group. Group contribution and user contribution will be described later.

[0031] In addition, the distribution processing unit 103 may distribute the amount (sales profit) paid by a user who purchased digital content to multiple users by associating the amount for each user with each of the multiple users' accounts (associating it with each user's wallet address) to distribute the amount (sales profit) to multiple users.

[0032] Furthermore, when buying and selling digital content using a blockchain, the distribution processing unit 103 may distribute the amount (sales profit) paid by a user who purchased digital content to each of the accounts of multiple users based on the group contribution degree and the user contribution degree by deploying the contract on the blockchain network 40. An example of the contract is shown in Figure 4.

[0033] FIG. 4 is a diagram showing an example configuration of a smart contract 50. The smart contract 50 shown in FIG. 4 is a contract (hereinafter referred to as an "NFT contract") that realizes an NFT associated with digital content (hereinafter referred to as a "digital content NFT"). An NFT contract can hold a key-value format DB that stores various variables called a state, and functions called methods. Methods can rewrite variables included in the state and execute arbitrary processes.

[0034] The token ID is an ID that uniquely identifies the digital content NFT. The owner address stores the wallet address of the group or user who owns the digital content NFT. The group's wallet address may be the address of the multisig wallet described above (specifically, the contract address of the contract that realizes the multisig wallet). In this embodiment, since it is assumed that multiple users will jointly create digital content, it is assumed that the initial owner address of the digital content NFT (i.e., the initial owner address before it is bought and sold) is the group's wallet address.

[0035] The group user address stores the wallet addresses of multiple users belonging to the group that created the digital content. The content URI indicates a URI that stores information regarding the storage location of the digital content associated with the digital content NFT. In this embodiment, the URI is assumed to indicate data on the content management server 60, but this embodiment is not limited to this. Note that actual content data may be stored instead of the content URI. The selling price stores the price at which the digital content is sold. The group contribution stores the degree of group contribution. Details will be described later.

[0036] The token generation method performs a process to generate a digital content NFT. The process of generating an NFT is also called minting. The token transfer method performs a process to transfer users who own a digital content NFT (i.e., a process to rewrite the "owner address" state). The token deletion method performs a process to delete a digital content NFT. The process of deleting an NFT is also called burning. The price setting method sets or updates the value of the "sale price" state. The group user addition method adds a user's wallet address to the "group user address" state. The group user deletion method deletes a specified user's wallet address from the "group user address" state. The group contribution setting method sets or updates the value of the "group contribution" state. The external data acquisition method acquires data outside the blockchain network 40 from the information server 30 (oracle). The distribution processing method distributes the amount paid by users who purchased digital content to multiple users' wallets based on group contribution and user contribution.

[0037] The NFT contract described above may be expressed as a program that causes a computer participating in the blockchain network 40 to perform the following processing.

[0038] 1. A process for storing information about the content (such as a URI) in a storage unit 2. A process of storing information about the owner of the content (for example, the wallet address of the user or group) and information about each of the multiple users included in the group that created the content (for example, the wallet address of each user) in a storage unit. 3. When an instruction to transfer ownership of content is received, a process of distributing the amount to be paid when transferring the content to multiple users based on the group contribution associated with the group and the user contribution associated with each of the multiple users.

[0039] <Processing Procedure> Next, the processing procedures performed by the content trading system 1 will be explained separately for cases where digital content is traded without using a blockchain and where digital content is traded using a blockchain.

[0040] (When buying and selling digital content without using blockchain) 5 is a sequence diagram showing an example of the processing procedure for creating a group account. In the example of FIG. 5, it is assumed that the user accounts of the multiple users belonging to the group are already managed by the transaction management server 10.

[0041] In step S10, one of the multiple users belonging to the group starts creating a group by operating the terminal 20. For example, the management unit 101 of the transaction management server 10 may display a screen for creating a group on the terminal 20 and accept input of information about the users belonging to the group, the group name, etc. The user information may be, for example, a user name or a user ID.

[0042] In this embodiment, the "users" belonging to a group may include, in addition to individual users, corporations such as brands and charities, and non-profit organizations (NPOs).

[0043] In step S11, the management unit 101 of the transaction management server 10 assigns a group ID and stores the information received in step S10 in the account management DB 100a in association with the group ID.

[0044] In step S12, the management unit 101 of the transaction management server 10 notifies the terminal 20 that the creation of the group account has been completed.

[0045] Fig. 6 is a sequence diagram showing an example of a processing procedure for selling digital content on the market. The processing procedure shown in Fig. 6 and the processing procedure shown in Fig. 9, which will be described later, may be repeatedly executed each time a group generates digital content and sells it on the market.

[0046] In step S20, one of the users belonging to the group operates terminal 20 to register the digital content to be sold. For example, management unit 101 of transaction management server 10 may display a screen for registering and selling digital content on terminal 20, and may accept input of the group ID of the group that created the digital content and data on the digital content. Management unit 101 may also accept a designation of the selling price of the digital content. The data of the digital content to be registered may be the actual data of the digital content, or the URI where the digital content is stored.

[0047] The transaction management server 10 may be able to limit the users who can purchase digital content. For example, the management unit 101 may accept the designation of users who can purchase digital content on a screen for registering digital content. Users who can purchase digital content may be limited to users who have pledged to pay a certain amount or more for the digital content, or may be limited to users who own NFTs of digital content previously sold by the group that created the digital content to be purchased.

[0048] In step S21, the management unit 101 of the transaction management server 10 assigns a content ID that uniquely identifies the digital content, and stores the information received in step S20 in the content management DB 100b in association with the content ID. In addition, the buying and selling processing unit 102 accepts buying and selling of digital content by displaying the registered digital content on the market.

[0049] In step S22, the management unit 101 of the transaction management server 10 notifies the terminal 20 that the registration of the digital content has been completed.

[0050] FIG. 7 is a sequence diagram showing an example of a processing procedure when digital content is sold in the market.

[0051] In step S30, the buying / selling processing unit 102 accepts a purchase of digital content from a user who wishes to purchase the digital content (hereinafter referred to as a "purchasing user"). For example, if the price of the digital content is set at 100 coins, the purchasing user can purchase the digital content by paying 100 coins (or 100 coins + gas fee).

[0052] In addition, in the processing procedure of step S20 of FIG. 6, if a user who can purchase the digital content is specified, the buying and selling processing unit 102 will permit the purchase of the digital content only if the purchasing user is the specified user.

[0053] Furthermore, the buying / selling processing unit 102 may permit a purchasing user to purchase the digital content only if the purchasing user meets a condition pre-specified by a group associated with the digital content. The condition may be, for example, that a majority of users belonging to the group agree to the sale, or that a pre-specified user among the users belonging to the group agrees to the sale.

[0054] In step S31, the buying and selling processing unit 102 accesses the information server 30 to request transmission of user information relating to each of a plurality of users who belong to the group that created the digital content for which purchase has been accepted.

[0055] In step S32, the information server 30 transmits the requested user information regarding each of the multiple users to the transaction management server 10.

[0056] In step S33, the distribution processing unit 103 distributes the amount paid by the purchasing user (sales profit) to the multiple users belonging to the group.

[0057] [Distribution method of sales profits] Next, a specific description will be given of a method for distributing the sales profit by the distribution processing unit 103 in the processing procedure of step S33. The distribution processing unit 103 distributes the amount (sales profit) paid by the purchasing user to multiple users based on the group contribution associated with the group and the user contribution associated with each of the multiple users belonging to the group.

[0058] Here, the group contribution level indicates the percentage of the profit from the sale of the digital content that will be distributed equally among all members of the group. The group contribution level may, for example, refer to the degree to which the value of the group contributes to the price of the digital content. The group contribution level is determined in advance by the transaction management server 10, and may not be determined by the users belonging to the group themselves.

[0059] The user contribution level is a degree indicating to which user the profits from the sale of digital content, excluding the group contribution level, are preferentially distributed. For example, it may refer to the degree to which the value of an individual user contributes to the price of the digital content.

[0060] Specifically, the distribution processing unit 103 may distribute the sales profit to multiple users by adding up, for each user, a first number obtained by multiplying the sales profit (amount) by the group contribution rate and dividing the result by the number of users among the multiple users, and a second number obtained by subtracting the sales profit multiplied by the group contribution rate from the sales profit, and distributing the result to each user according to the user's contribution rate.

[0061] For example, suppose there are four users, A to D, in a group. The group contribution rate is 60%, and the user contribution rates of users A to D are set to 10%, 20%, 20%, and 50%, respectively. The profit from sales is 100 coins.

[0062] First, calculate the first number. In this case, 100 x 60% ÷ 4 = 15, so the first number per user is 15 coins. Next, calculate the second number. 100 - (100% x 60%) = 40, so User A's second number is 40 x 10% = 4 coins. Similarly, the second number for users B and C would be 40 x 20% = 8 coins. The second number for user D would be 40 x 50% = 20 coins.

[0063] Next, the first and second numbers are added together for each user to distribute the profits from the sale to each user. User A receives 15 + 5 = 19 coins. Users B and C receive 15 + 8 = 23 coins. User D receives 15 + 20 = 35 coins.

[0064] [How user contribution is determined] The user contribution level may be determined using one or more external data. The number and content of the external data items used to determine the user contribution level are not particularly limited, and may be, for example, the total amount of purchases and sales made by the user in the digital content market, the number of followers in the digital content market, etc. Furthermore, the number and content of the external data items used to determine the user contribution level may not be determined by the users belonging to the group.

[0065] Here, we will explain the case where user contribution is determined using the total amount of buying and selling performed by users in the digital content market. The total amounts of buying and selling performed by users A to D in the market are assumed to be $100, $200, $400, and $300, respectively. In this case, user A's user contribution is 100÷(100+200+400+300)=10%. Similarly, user contributions of users B to D are 20%, 40%, and 30%, respectively.

[0066] Next, we will explain how to determine user contribution using the number of followers. Assume that the number of followers in the market for users A to D is 10, 20, 70, and 100, respectively. In this case, user A's user contribution is 10÷(10+20+70+100)=5%. Similarly, the user contributions of users B to D are 10%, 35%, and 50%, respectively.

[0067] Furthermore, a case will be described in which the user contribution level is determined using both the total amount of buying and selling made by the user in the digital content market and the number of followers of the user. In this case, the distribution processing unit 103 may determine the user contribution level by adding up the user contribution levels for each level and dividing it by the number of levels. Specifically, the user contribution level of user A is (10% + 5%) ÷ 2 = 7.5%. The user contribution level of user B is (20% + 10%) ÷ 2 = 15%. The user contribution level of user C is (40% + 35%) ÷ 2 = 37.5%. The user contribution level of user D is (30% + 50%) ÷ 2 = 40%.

[0068] [Variations regarding distribution of sales profits] The distribution processing unit 103 may distribute the amount remaining after deducting the market commission from the amount paid by the purchasing user to each user.

[0069] When the digital content is traded for the second or subsequent time, the distribution processing unit 103 may distribute to each user the amount paid by the purchasing user minus the share of the user who sold the digital content. The share of the user who sold the digital content is arbitrary, but may be, for example, a predetermined percentage (e.g., 90%) of the amount paid by the purchasing user.

[0070] For example, a condition for purchasing digital content may be set to the purchase of a specific item other than the digital content. In this case, the distribution processing unit 103 may distribute a predetermined percentage of the sales profit of the specific item to each user in the group as an affiliate fee. The method of distribution to each user in the group may be the same as the method described in the section on distributing sales profits.

[0071] (When using blockchain to buy and sell digital content) Fig. 8 is a sequence diagram showing an example of the processing procedure for creating a group account. In the example of Fig. 8, it is assumed that the user accounts and wallet addresses of the multiple users belonging to the group are already managed by the transaction management server 10.

[0072] In step S100, one of the multiple users belonging to the group starts creating a group by operating the terminal 20. For example, the management unit 101 of the transaction management server 10 may display a screen for creating a group on the terminal 20 and accept input of information about the users belonging to the group, the group name, etc. The user information may be, for example, a user name, a user ID, a wallet address, etc.

[0073] In step S101, the management unit 101 transmits a transaction for generating a multi-sig wallet to the blockchain network 40. At this time, the management unit 101 specifies the wallet addresses of each user included in the group as arguments of the transaction.

[0074] In step S102, a computer participating in the blockchain network 40 generates a contract for the multi-sig wallet and notifies the transaction management server 10 of the contract address of the multi-sig wallet.

[0075] In step S103, the management unit 101 of the transaction management server 10 assigns a group ID and stores the information received in step S10 and the contract address of the multi-signature wallet in the account management DB 100a in association with the group ID.

[0076] In step S104, the management unit 101 of the transaction management server 10 notifies the terminal 20 that the creation of the group account has been completed.

[0077] FIG. 9 is a sequence diagram showing an example of a processing procedure when selling digital content in the market.

[0078] In step S200, one of the users belonging to the group registers the digital content to be sold by operating terminal 20. Points that will not be particularly described may be the same as step S20 in FIG.

[0079] In step S201, the management unit 101 sends a transaction to the NFT contract instructing it to execute a token generation method, a group user addition method, a price setting method, and a group contribution setting method.

[0080] The wallet addresses of each of the multiple users who created the digital content are specified as arguments to the Add Group User method. The wallet addresses specified as arguments to the Add Group User method may be the same as the wallet addresses specified when the multisig wallet was created. Note that the management unit 101 may include wallet addresses that are not included in the wallet addresses specified when the multisig wallet was created, among the wallet addresses specified as arguments to the Add Group User method. This is because, for example, there may be cases where other users (creators) who do not belong to the group temporarily participate in the creation of the digital content. In such cases, by including the wallet addresses of users who do not belong to the group in the digital content NFT, it becomes possible to distribute sales profits to users who temporarily participate in the creation of the digital content.

[0081] The argument to the price setting method is the selling price of the digital content NFT. The argument to the group contribution setting method is the group contribution value (%). When using a multi-signature wallet, signatures from a specified number of users among the multiple users in the group are required when sending a transaction to execute each method.

[0082] In step S202, the computer participating in the blockchain network 40 notifies the transaction management server 10 that the execution of various methods has been completed. At this time, the transaction management server 10 is notified of the token ID of the generated NFT.

[0083] In step S203, the management unit 101 of the transaction management server 10 stores the information received in step S20 in the content management DB 100b in association with the token ID. In addition, the buying and selling processing unit 102 accepts buying and selling of digital content by displaying the registered digital content on the market.

[0084] In step S204, the management unit 101 of the transaction management server 10 notifies the terminal 20 that the registration of the digital content has been completed.

[0085] FIG. 10 is a sequence diagram showing an example of a processing procedure when digital content is sold in the market.

[0086] In step S300, the buying and selling processing unit 102 accepts a purchase of digital content from a purchasing user who wishes to purchase the digital content. Points that are not particularly described may be the same as step S30 in FIG.

[0087] In step S301, the trading processor 102 sends a transaction instructing execution of a token transfer method. The token ID and the wallet address of the destination user are specified as arguments to the token transfer method. When using a multi-signature wallet, signatures from a specified number of users among the multiple users included in the group are required when sending a transaction to execute the token transfer method.

[0088] In step S302, the computer of the blockchain network 40 that executes the NFT contract executes an external data acquisition method to request user information about each of the multiple users managed in the "group user address" state from the information server 30. Note that the number of items of user information requested from the information server 30 may be multiple.

[0089] In step S303, the information server 30 sends the user information regarding each of the requested multiple users to a computer in the blockchain network 40.

[0090] In step S304, the computer of the blockchain network 40 executing the NFT contract executes a distribution processing method to distribute the amount paid by the purchasing user (sales profit) to the wallet addresses of multiple users belonging to the group.

[0091] In step S305, the computer of the blockchain network 40 executing the NFT contract notifies the transaction management server 10 that the token transfer method has been completed.

[0092] In the processing procedure of step S304 described above, the method of distributing sales profits and the method of determining user contribution level may be the same as the [Distribution of sales profits], [Determination of user contribution level], and [Variant example regarding distribution of sales profits] described above (when realizing the sale and purchase of digital content without using blockchain).

[0093] <Summary> According to the embodiment described above, when multiple users jointly create digital content, it becomes possible to distribute the profits from the sale of the digital content among the multiple users. Furthermore, by using a multi-signature wallet, it becomes possible for multiple users to manage the ownership or copyright of the digital content jointly created by the multiple users as a group, which was not possible until now, and this solves the psychological and economic problems of users.

[0094] The above-described embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The flowcharts, sequences, elements included in the embodiments, and their arrangements, materials, conditions, shapes, sizes, etc., described in the embodiments are not limited to those illustrated and can be modified as appropriate. Furthermore, configurations shown in different embodiments can be partially substituted or combined with each other. [Explanation of symbols]

[0095] 1 Content trading system, 10 trading management server, 11 processor, 12 storage device, 13 network IF, 14 input device, 15 output device, 20 terminal, 30 information server, 40 blockchain network, 50 smart contract, 60 content management server, 100 storage unit, 100a account management DB, 100b content management DB, 101 management unit, 102 trading processing unit, 103 distribution processing unit

Claims

1. a storage unit that stores information about the content; a management unit that manages a user who owns the content, a group that created the content, and a plurality of users included in the group; a trading processing unit that trades the content; a distribution processing unit that, when receiving an instruction to transfer ownership of the content, distributes an amount to be paid when transferring the content to the plurality of users based on a group contribution associated with the group and a user contribution associated with each of the plurality of users; An information processing device having the above.

2. The distribution processing unit a first number obtained by multiplying the amount by the group contribution and dividing the result by the number of users of the plurality of users; a second number obtained by subtracting a value obtained by multiplying the amount by the group contribution from the amount, and distributing the result to each of the users according to the user contribution; and distributing the amount to the plurality of users by adding up the amounts for each user. The information processing device according to claim 1 .

3. the management unit manages the group by associating the accounts of each of the plurality of users with the account of the group. The information processing device according to claim 1 .

4. the distribution processing unit distributes the amount to the plurality of users by associating the amount for each user when distributing the amount to the plurality of users with each account of the plurality of users; The information processing device according to claim 3 .

5. The distribution processing unit distributes the amount to the plurality of users by deploying a contract on a blockchain network that distributes the amount to each account of the plurality of users based on the group contribution and the user contribution. The information processing device according to claim 1 .

6. An information processing method executed by an information processing device, storing information about the content in a storage unit; managing a user who owns the content, a group that created the content, and a plurality of users included in the group; a step of buying and selling the content; When receiving an instruction to transfer ownership of the content, allocating an amount to be paid when transferring the content to the plurality of users based on a group contribution associated with the group and a user contribution associated with each of the plurality of users; An information processing method, including:

7. On the computer, storing information about the content in a storage unit; managing a user who owns the content, a group that created the content, and a plurality of users included in the group; a step of buying and selling the content; When receiving an instruction to transfer ownership of the content, allocating an amount to be paid when transferring the content to the plurality of users based on a group contribution associated with the group and a user contribution associated with each of the plurality of users; A program to execute.

8. The computers participating in the distributed computing network storing information about the content in a storage unit; storing information about an owner of the content and information about each of a plurality of users included in a group that created the content in a storage unit; When receiving an instruction to transfer ownership of the content, distributing an amount to be paid when transferring the content to the plurality of users based on a group contribution associated with the group and a user contribution associated with each of the plurality of users; A program to execute.

Images