Definition
A cryptographically signed digital record that links a specific physical item to its verified owner at a specific point in time. The Digital Ownership Certificate is the atomic unit of the Ownich system — it is issued at registration and updated on every verified ownership transfer.
In detail
A DOC contains: the item's identity (name, category, serial number, description), the owner's verified identity, the date of ownership, supporting evidence (receipts, photographs, appraisals), and a cryptographic signature that makes the record tamper-evident. It is not a static document — it is a live record that is superseded when ownership transfers. The previous owner's certificate is archived in the Ownership Passport; the new owner receives a new certificate.
A Digital Ownership Certificate is not a certificate of authenticity. A certificate of authenticity is a static document that proves an item was genuine at one point in time. A DOC is a live ownership record that follows the item through its entire lifecycle.