thumb|Sharp-shinned hawk, a small member of the Accipitrinae subfamily Hawks are birds of prey of the family Accipitridae. They are very widely distributed and are found on all continents, except Ant
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 0x15448e95c332c5939c0c029ab4b19c1bdc322401051673a1831486f9905e3158. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac123fe0-ed8b-491f-90cb-ab61603bc5a8.json and https://artists.proofprofile.net/proofs/artist/ac123fe0-ed8b-491f-90cb-ab61603bc5a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).