Patent ID: 11971929
Assignee: WACOM CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. The device of claim 1, wherein the processing circuitry, in operation:
creates a record including an original document and a modification to the original document;
generates metadata associated with the modification to the original document;
stores the modification in a data store;
transmits a request for creation and registration of a decentralized identifier (DID) document for the modification based on the generated metadata;
receives the created DID document for the modification and generates modified document metadata including a document hash and the created DID document for the modification;
transmits a request for recordation of the modification in a blockchain transaction, creation and registration of a DID document for the modified document, and generation of verifiable credentials for the modification;
stores the generated verifiable credentials for the modification;
generates a quick response (QR) code for the DID document for the modification; and
adds a visual representation of the modification and the QR code for the modification to the original document, generating a sealed document.