thumb|A zun with taotie dating to the Shang dynasty thumb|A rare Xi zun in the shape of an ox thumb|Western Zhou goose-shaped bronze zun. National Museum of China The zun or yi, used until the Northe
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff0ad6a5f3466e644bf932b2d96f2f2cd0cf6169bb129ef1b1b92d1a25cb742. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/775e1d9d-8a88-4cb6-95c5-918f3d7e9ca7.json and https://artists.proofprofile.net/proofs/artist/775e1d9d-8a88-4cb6-95c5-918f3d7e9ca7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).