Barry Rose/John Mitchinson/Frederick Harvey/Choir of Guildford Cathedral
{"copyright_id":"0x8d5fda69db378c8b2f14c747692daebe9b2a34c45ed661b25d41c2b1fff7feaf","name":"Barry Rose/John Mitchinson/Frederick Harvey/Choir of Guildford Cathedral","registered_at":"2026-06-20T11:52:59Z","symbol":"NIM1605530","token_address":"0x3be8e376e876c6107877bfb6db1b32c2141248f7","type":"artist","uuid":"af322e36-c826-4c1c-8347-5004941960f4"}
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 0x8d5fda69db378c8b2f14c747692daebe9b2a34c45ed661b25d41c2b1fff7feaf. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af322e36-c826-4c1c-8347-5004941960f4.json and https://artists.proofprofile.net/proofs/artist/af322e36-c826-4c1c-8347-5004941960f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).