Abstract: Embodiments of the present application provide a blockchain-based data evidence storage method, a blockchain-based data check method, and relevant apparatuses. The data evidence storage method comprises: performing irreversible encryption on data content of a target file to obtain irreversibly encrypted data of the target file; storing the irreversibly encrypted data in a blockchain and obtaining on-chain evidence storage information of the irreversibly encrypted data; generating a digital watermark of the on-chain evidence storage information; embedding the digital watermark into the target file; and storing the target file embedded with the digital watermark of the on-chain evidence storage information.

Abstract: A method for verifying commodities in batches based on a blockchain, includes: receiving a warehousing verification transaction sent via a blockchain network by a warehouse provider, the warehousing verification transaction including a commodity identifier acquired from a commodity to be warehoused and a contract address of an invoked smart contract; invoking, in response to the warehousing verification transaction, a check logic declared in the smart contract corresponding to the contract address, to perform a check the commodity identifier; invoking, in response to the check succeeding, a warehousing verification logic declared in the smart contract corresponding to the contract address, to query for a traceability identifier and a distributor identifier that are associated with the commodity identifier in the blockchain.

Abstract: Embodiments of the present application provide a blockchain-based data evidence storage method, a blockchain-based data check method, and relevant apparatuses. The data evidence storage method comprises: performing irreversible encryption on data content of a target file to obtain irreversibly encrypted data of the target file; storing the irreversibly encrypted data in a blockchain and obtaining on-chain evidence storage information of the irreversibly encrypted data; generating a digital watermark of the on-chain evidence storage information; embedding the digital watermark into the target file; and storing the target file embedded with the digital watermark of the on-chain evidence storage information.

Abstract: The present application discloses a blockchain-based image transaction system, method, and apparatus. An exemplary method comprises: receiving a target image uploaded from a transaction node in a blockchain, wherein the target image is provided to the transaction node by a user; authenticating, based on image content of the target image, copyright of the target image; if the authentication is successful: generating a copyright certificate of the target image; sending the copyright certificate to the transaction node for the transaction node to display the copyright certificate and a preset prompt window to the user, wherein the preset prompt window inquires the user whether to make the target image as an image available for transaction; and if confirmation information is received, adding the target image into an image transaction pool, wherein the confirmation information indicates the user has determined the target image as an image available for transaction.

Abstract: Embodiments of the present application provide a blockchain-based data evidence storage method, a blockchain-based data check method, and relevant apparatuses. The data evidence storage method comprises: performing irreversible encryption on data content of a target file to obtain irreversibly encrypted data of the target file; storing the irreversibly encrypted data in a blockchain and obtaining on-chain evidence storage information of the irreversibly encrypted data; generating a digital watermark of the on-chain evidence storage information; embedding the digital watermark into the target file; and storing the target file embedded with the digital watermark of the on-chain evidence storage information.

Abstract: One or more embodiments of the specification provide a blockchain-based relationship binding method, apparatus, and device. An exemplary method may include: receiving a user binding request including a binding tag, the binding tag includes (1) a binding type of a binding relationship, and (2) role information of the second user in the binding relationship; sending a confirmation request to a second user; retrieving a relationship table of the second user; in response to the binding type in the user binding request includes a one-to-one binding relationship: determining whether the one or more binding types in the relationship table of the second user include the binding type in the user binding request, and if yes, terminating the method; and generating a record of binding relationship; writing the record of binding relationship into a blockchain; and updating the relationship table in the local database.

Abstract: One or more embodiments of the present specification provide a blockchain-based enterprise authentication method, apparatus, and device.

Abstract: One or more embodiments of the specification provide a blockchain-based relationship binding method, apparatus, and device, wherein the method comprises: receiving a user binding request comprising a binding tag, the binding tag includes (1) a binding type of a binding relationship, and (2) role information of the second user in the binding relationship; sending a confirmation request to the user terminal of the second user; retrieving a relationship table of the second user from a local database of the blockchain node; in response to the binding type in the user binding request comprises a one-to-one binding relationship: determining whether the one or more binding types in the relationship table of the second user comprise the binding type in the user binding request, and if yes, terminating the method; and generating a record of binding relationship; writing the record of binding relationship into the blockchain; and updating the relationship table in the local database according to the user binding reques

Abstract: Embodiments of the specification provide a blockchain-based identity authentication method, apparatus, and device.

Abstract: Embodiments of the specification provide a blockchain-based identity authentication method, apparatus, and device.

Abstract: Embodiments of the present application provide a blockchain-based data evidence storage method, a blockchain-based data check method, and relevant apparatuses. The data evidence storage method comprises: performing irreversible encryption on data content of a target file to obtain irreversibly encrypted data of the target file; storing the irreversibly encrypted data in a blockchain and obtaining on-chain evidence storage information of the irreversibly encrypted data; generating a digital watermark of the on-chain evidence storage information; embedding the digital watermark into the target file; and storing the target file embedded with the digital watermark of the on-chain evidence storage information.

Abstract: One or more embodiments of the present specification provide a blockchain-based enterprise authentication method, apparatus, and device.

Abstract: The present application discloses a blockchain-based image transaction system, method, and apparatus. An exemplary method comprises: receiving a target image uploaded from a transaction node in a blockchain, wherein the target image is provided to the transaction node by a user; authenticating, based on image content of the target image, copyright of the target image; if the authentication is successful: generating a copyright certificate of the target image; sending the copyright certificate to the transaction node for the transaction node to display the copyright certificate and a preset prompt window to the user, wherein the preset prompt window inquires the user whether to make the target image as an image available for transaction; and if confirmation information is received, adding the target image into an image transaction pool, wherein the confirmation information indicates the user has determined the target image as an image available for transaction.

Abstract: Implementations of this disclosure provide for geographic location-based multimedia information display. An example method performed by a node in a blockchain includes receiving transaction data generated by a client device, the transaction data including multimedia information and geographic location information, and in response to receiving the transaction data, performing consensus processing for a transaction, and publishing the transaction to the blockchain network, such that a terminal display device obtains the multimedia information from a blockchain network and displays the multimedia information. The blockchain node classifies transactions in the blockchain network based on the geographic location information to generate a plurality of transaction sets using the geographic location information as a category label, and provides the transaction sets to the terminal display device, such that the terminal display device displays multimedia information comprised in the transaction sets by category.