thumb|A sea lion and a zookeeper at the Welsh Mountain Zoo A zoo (short for zoological garden; also called a zoological park, animal park, or menagerie) is a facility where animals are kept within enc
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 0x1db4ead56cc8fc4b2b4ba4f7b493647dd232f3372fbbb66effe2de32babd06c3. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12522736-30e9-43ee-a7e0-bfff7a342f8b.json and https://artists.proofprofile.net/proofs/artist/12522736-30e9-43ee-a7e0-bfff7a342f8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).