Elly Ameling/Dame Janet Baker/Ian Partridge/John Shirley-Quirk/King's College Choir, Cambridge/Academy of St. Martin-in-the-Fields/Sir David Willcocks
{"copyright_id":"0x4bab6ceccbb2adc46874d68553c548ff0da4563d032bb7e5c4b603d91945b91d","name":"Elly Ameling/Dame Janet Baker/Ian Partridge/John Shirley-Quirk/King's College Choir, Cambridge/Academy of St. Martin-in-the-Fields/Sir David Willcocks","registered_at":"2026-06-20T05:57:18Z","symbol":"NIM1532610","token_address":"0xce6d3cf96a26c494dad8df55df005f37847c5636","type":"artist","uuid":"a15fd16c-4f44-47c9-855a-c6d7017cab43"}
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 0x4bab6ceccbb2adc46874d68553c548ff0da4563d032bb7e5c4b603d91945b91d. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a15fd16c-4f44-47c9-855a-c6d7017cab43.json and https://artists.proofprofile.net/proofs/artist/a15fd16c-4f44-47c9-855a-c6d7017cab43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).