thumb|upright|A traditional perry (poiré in French) bottled under cork and cage from Normandy Perry or pear cider is an alcoholic beverage made from fermented pears, traditionally in England (particu
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962d64e71c71a88b41d6a26e29c54d938a196d5f2807e57fac60c51e3bc50584. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d63c8c0-40e8-48af-84a2-86e418d79ffc.json and https://artists.proofprofile.net/proofs/artist/1d63c8c0-40e8-48af-84a2-86e418d79ffc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).