{"copyright_id":"0x62a6b49446349edfbea52bfce8be2fc369e05b5ae2ad260c6ae454db3f578a25","name":"Der Barbier von Sevilla","registered_at":"2026-06-16T15:44:13Z","symbol":"NIM1098780","token_address":"0x209f7d1176bf6fbee670fddb1c7af470e2d2cd64","type":"artist","uuid":"4af8f9ca-ebf8-4d7e-aa71-1ee25d1ef661"}
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 0x62a6b49446349edfbea52bfce8be2fc369e05b5ae2ad260c6ae454db3f578a25. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4af8f9ca-ebf8-4d7e-aa71-1ee25d1ef661.json and https://artists.proofprofile.net/proofs/artist/4af8f9ca-ebf8-4d7e-aa71-1ee25d1ef661.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).