A method for connecting based on a blockchain regional service

Abstract

This invention discloses a method for blockchain-based regional service integration, belonging to the field of blockchain cross-regional collaborative service technology. Addressing the problems of data silos, low reliability of centralized evidence storage, high privacy risks, and high costs associated with multi-regional integration in existing cross-regional service integration methods, this invention establishes a multi-regional permissioned consortium blockchain. Each region deploys independent nodes and retains its local original data, only uploading service metadata and business hash values ​​to the blockchain to generate a unified service directory. Asymmetric encryption enables hierarchical cross-domain access authorization, and smart contracts facilitate the reliable verification of material hashes, automatically transferring cross-regional business and storing evidence on the blockchain throughout the entire process. New regions only need to deploy nodes and upload service hashes to connect, without modifying existing systems. This solution ensures data remains within its domain, is tamper-proof and traceable, and is suitable for scenarios such as cross-regional government joint processing, industry supply and demand matching, and remote collaborative supervision, effectively reducing integration costs and improving the efficiency of cross-regional service processing.

Description

Technical Field

[0001] This invention belongs to the field of blockchain cross-regional collaborative service technology. Specifically, it relates to a method for achieving trusted interoperability of service data and automatic connection of business processes between different administrative regions, industrial parks, and government platforms based on a consortium blockchain. It can be widely applied to scenarios such as cross-regional joint government affairs processing, matching of industrial resource supply and demand, handling of public services in different locations, and collaborative supervision of regional enterprises. Technical Background

[0002] Currently, provinces, cities, districts, and counties across China have established independent government service platforms and industry service systems. These systems are developed by different vendors, have inconsistent data standards, and are physically isolated, resulting in numerous "data silos." Existing cross-regional service connections generally adopt a centralized data transfer platform model, which has the following prominent drawbacks: Insufficient data credibility: Centralized platforms uniformly store and transfer cross-regional business data, which poses a high risk of data tampering and deletion. When business disputes occur, there is no complete and tamper-proof evidence of operations, making it difficult to define rights and responsibilities. High integration and transformation costs: Each new cooperation area requires separate interface development and data adaptation. In multi-region linkage scenarios, the number of interfaces increases exponentially, resulting in high operation and maintenance costs. Data privacy and security are difficult to guarantee: centralized platforms centrally acquire complete business data from various regions, which can easily lead to the leakage of sensitive information of enterprises and citizens. Due to data security concerns, various regions are unwilling to open their local databases. Low efficiency of business process collaboration: Cross-regional business approval and material verification require manual offline transfer or manual data synchronization, lacking an automated and reliable transfer mechanism, resulting in long processing cycles.

[0003] Existing blockchain cross-chain connection solutions mostly focus on public chain asset interoperability, which is not suitable for alliance service scenarios such as government affairs and industry with regional permission control and compliance supervision requirements. They cannot match the core needs of regional hierarchical authorization, local data retention, and cross-domain trusted verification. Therefore, there is an urgent need for a lightweight and highly secure blockchain regional service connection method that is suitable for regional service scenarios. Summary of the Invention

[0004] 1. Purpose of the invention To address the problems of poor reliability, high transformation costs, significant privacy risks, and low collaboration efficiency in existing centralized architectures for cross-regional service integration, this invention provides a blockchain-based method for regional service integration. This method leverages a multi-node consortium blockchain architecture to achieve autonomous management of service nodes in each region, on-chain storage of business data, prevention of local original data leaving the region, and reliable verification of cross-regional materials. This reduces the development costs of cross-regional service integration, clarifies business responsibilities, ensures data privacy and security, and automates the flow of cross-regional service business processes.

[0005] 2. Technical Solution A method for connecting regional services based on blockchain includes a regional node deployment module, an on-chain unified service catalog module, a hierarchical permission encryption module, a cross-domain trusted verification contract, and a business automatic flow module. The steps are as follows: Step 1: Regional consortium chain node setup. Each region participating in the service connection deploys an independent blockchain node. Each node is bound to the government / industry service backend system of its region. The nodes form a permissioned consortium chain. Each regional node only has read and write permissions to the local business database. The original business data is permanently stored locally and is not uploaded to the blockchain.

[0006] Step 2: Unified Service Catalog Registration on the Blockchain. Each region will abstract the services, material standards, processing rules, and verification logic that can be provided locally into standardized service items, and only upload service metadata, data hash values, and authorized access keys to the consortium blockchain to generate a unified service catalog; only hash digests are stored on the blockchain, and no original sensitive information of users or enterprises is stored.

[0007] Step 3: Hierarchical Regional Permission Encryption Authorization Design. Three levels of access permissions are designed: internal regional permissions, cross-regional read-only verification permissions, and cross-regional business processing permissions. An asymmetric encryption algorithm is used to assign independent public and private keys to each regional node. When a cross-regional service request is initiated, the request information is encrypted with the public key, and only the target region's private key can decrypt and read it, realizing targeted data interaction.

[0008] Step 4: Deploy a standardized cross-domain verification smart contract driven by a smart contract. When a service request is initiated in region A, the contract automatically reads the on-chain service catalog and sends a material hash verification instruction to the node in region B. The local database in region B retrieves the original material, generates a hash value, and compares it with the on-chain hash. The comparison result only records the verification status on the chain, and the original material is not transmitted across domains.

[0009] Step 5: After the cross-regional business process is automatically verified, the smart contract automatically triggers the cross-regional business process logic, and packages the processing receipt, approval node record, operation timestamp, and operator identity information onto the blockchain for evidence storage; the entire process operation record is tamper-proof, and each region can retrieve the on-chain evidence at any time as proof of business rights and responsibilities.

[0010] Step 6: Dynamic Node Management and Service Updates When adding new cooperative regions, you only need to deploy chain nodes, complete key authorization, and upload the local service directory hash to join the alliance. There is no need to modify other regional systems. When regional service matters change, only the on-chain metadata hash is updated, which does not affect the operation of other regional businesses.

[0011] 3. Beneficial effects (1) Strong data security and privacy: Original business data is stored locally in each region, and only hash digests are stored on the chain, preventing the centralized leakage of sensitive information; asymmetric encryption for targeted interaction, no third party can steal business data; (2) Significantly reduced integration and transformation costs: New regions only need to deploy single chain nodes, without the need for point-to-point interface development, adapting to large-scale collaborative scenarios in multiple regions; (3) Fully trustworthy and traceable: All cross-domain applications, verifications, and approvals are stored on the chain, the data cannot be tampered with, and in the event of a business dispute, the on-chain records can be directly retrieved to determine the rights and responsibilities; (4) Improved business processing efficiency: Smart contracts automatically complete material verification and process push, replacing manual offline processing and shortening the time limit for cross-regional service processing; (5) Strong scalability: Supports access to multiple types of regional services such as government affairs, industry, people's livelihood, and supervision, and nodes can be dynamically added or removed to adapt to collaborative scenarios in different scales of regions. Detailed Implementation

[0012] Example 1: Cross-county government service integration 1. Node Deployment: Blockchain alliance nodes are deployed in Districts A, B, and C of a certain city. Each node connects to the government service approval system of its respective district to build a city-level licensing alliance chain. 2. Service catalog on the blockchain: The three zones will standardize services such as ID card replacement in other places, business license verification in other places, and real estate inquiry, and upload the service catalog on the blockchain with the service name, material list, and verification rule hash. 3. Access Control: Each of the three zones is assigned an independent public and private key. Staff within the zone have full read and write permissions, while staff in other zones only have permission to verify material hashes. 4. Cross-regional business processing: When a citizen in Zone A applies for verification of a business license from another region at the local government service hall, the node in Zone A generates a hash of the application materials and uploads it to the blockchain contract. The contract is automatically pushed to the node in Zone B. The local database in Zone B retrieves the original data of the business license, calculates the hash, compares it with the hash on the blockchain, and uploads the "verification passed" result to the blockchain. 5. Automated process completion: After the contract receives the verification approval signal, it automatically generates a cross-regional service receipt, and the entire process operation time, operators, and verification results are permanently stored on the blockchain; 6. Expansion and Adaptation: When adding a new district / county to the network, only the chain node needs to be deployed and the local government service hash directory needs to be uploaded to complete the connection. There is no need to modify the original systems of districts A / B / C.

[0013] Example 2: Cross-city industrial supply and demand service matching 1. Alliance Establishment: Industrial parks in City A and City B will deploy blockchain nodes to form an industrial service alliance chain; 2. Supply and demand catalogs on the blockchain: The two parks respectively upload metadata such as enterprise production capacity, raw material demand, and warehousing resources to the blockchain; 3. Encrypted Matching: When a company in City A initiates a cross-regional inquiry for raw material procurement, the request information is transmitted using the public key of City B; City B's local database matches supply and demand data, and only the hash of the matching result is sent back to the blockchain. 4. Automatic Contract Matching: After a successful match, the smart contract automatically pushes the qualification certificates of both parties to the matching platform. All subsequent contract performance and logistics verification records are stored on the blockchain, enabling reliable matching of cross-regional industrial resources.

[0014] Example 3: Cross-regional market supervision coordination and docking Market supervision bureaus from multiple districts and counties are connected to the same consortium blockchain. Each region hashes and uploads information on enterprise registration, administrative penalties, and abnormal operations to the blockchain. When conducting joint inspections across regions, inspection nodes initiate information verification through contracts. Local original business data is not transmitted to the outside world. Enterprise qualification verification is completed only through hash comparison. The entire inspection process is recorded, meeting the regulatory compliance and evidence preservation requirements.

Claims

1. A method for connecting regional services based on blockchain, comprising the steps of building a multi-regional consortium blockchain, connecting service providers in each region to on-chain nodes, matching cross-regional service supply and demand, service fulfillment, and full-process evidence storage, characterized in that, Specifically, it includes the following steps: S1. Construct a regional service consortium blockchain network, dividing it into multi-level regional nodes, including local service nodes, cross-domain routing nodes, and regulatory audit nodes; issue on-chain DID decentralized identity certificates to all regional service entities, and standardize and encapsulate the service resources of each region into on-chain service metadata and store it on the blockchain. S2. Deploy a service integration smart contract set, which includes a service registration contract, a cross-domain routing contract, a permission authorization contract, a performance settlement contract, and a dispute resolution contract; Unify regional service interface standards and cross-chain data interaction protocols to enable data interoperability between heterogeneous regional business systems and consortium blockchains; S3. Receive cross-region service connection requests submitted by the initiating node, and use the routing contract to parse the service type, target region, permission level, and data anonymization rules in the request. Traverse the on-chain service metadata to complete trusted supply and demand matching and generate temporary connection session credentials. S4. Based on the DID credential, complete the two-way on-chain identity verification and access permission approval between the supply and demand parties. After the approval is approved, the encrypted data interaction channel is automatically opened to complete the business data interaction in an isolated privacy computing environment. The entire interaction log is synchronized to the chain in real time. S5. After the service integration and fulfillment are completed, the settlement contract will automatically perform reconciliation, billing, fund clearing and generate performance vouchers; If a dispute arises during the connection process, the regulatory node retrieves the immutable interactive evidence data on the blockchain and automatically determines and resolves the dispute through the dispute resolution contract. S6. Regulatory audit nodes periodically traverse the entire chain of service connection block data to generate cross-regional service connection audit reports. The reports are simultaneously uploaded to the chain for storage, supporting regulatory agencies to trace, verify, and retrieve the entire process connection records in real time.

2. The method for blockchain-based regional service integration according to claim 1, characterized in that, The service metadata mentioned in step S1 includes the service's home region, service function tags, calling permissions, data access scope, service billing rules, and privacy desensitization strategy. All metadata is written into the block after being signed with asymmetric encryption.

3. The method for blockchain-based regional service integration according to claim 1, characterized in that, The cross-chain data interaction protocol described in step S2 adopts a hierarchical routing architecture. Service calls within the local area go through the internal consensus channel, while cross-regional service calls are relayed through routing nodes. The relayed data is transmitted using homomorphic encryption, and the original business data does not leave the local node for local storage.

4. The method for blockchain-based regional service integration according to claim 1, characterized in that, Step S3, the trusted supply and demand matching process, includes multi-dimensional weighted scoring. The weighted dimensions include regional trust score, service historical fulfillment rate, response time, and compliance level. The matching service list is output in order of score.

5. The method for blockchain-based regional service integration according to claim 1, characterized in that, In step S4, the two-way identity verification adopts an on-chain multi-signature verification mechanism, which requires the signatures of the initiator, the provider, and the local regulator to be verified before a connection session can be established.

6. The method for blockchain-based regional service integration according to claim 1, characterized in that, In step S5, the on-chain evidence storage data includes connection request messages, identity verification records, data interaction logs, service operation logs, settlement vouchers, and dispute resolution records. All evidence storage blocks are stamped with node hash fingerprints, making them tamper-proof and permanently traceable.

7. The method for blockchain-based regional service integration according to claim 1, characterized in that, In step S6, the audit report supports multi-dimensional retrieval by region, service type, and connection time. Regulatory nodes can issue on-chain freezing instructions to suspend the service connection channels in regions with violations.

8. The method for blockchain-based regional service integration according to claim 1, characterized in that, It also includes a service dynamic credit update step: after each cross-regional service connection is completed, the smart contract updates the on-chain credit score of the corresponding regional service entity based on the performance, and the credit score is used for subsequent supply and demand matching weight calculation.

9. The method for blockchain-based regional service integration according to claim 1, characterized in that, It also includes a cross-regional data hierarchical desensitization module, which automatically performs masking, differential privacy, and data desensitization processing on sensitive fields according to the access permissions, and only opens the minimum dataset required for business.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the blockchain-based regional service docking method according to any one of claims 1 to 9.

11. A blockchain-based regional service docking device, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the blockchain-based regional service docking method according to any one of claims 1 to 9.