{"copyright_id":"0x755e4f7e5cb08fac1bd7cbc3cbfdad1b92bf3ab9949ef43471b575c995b8db08","name":"Nickerbocker & Freundin","registered_at":"2026-06-16T11:19:17Z","symbol":"NIM1035577","token_address":"0x8e6f2cadc52e83c9ec8e0faa9336b4aba8977c4b","type":"artist","uuid":"3e471f12-5d4f-4e26-aec1-dc9ef2b167c3"}
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 0x755e4f7e5cb08fac1bd7cbc3cbfdad1b92bf3ab9949ef43471b575c995b8db08. Chain 2 (Bitcoin): anchored in block 954039 (2026-06-17T03:00:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e471f12-5d4f-4e26-aec1-dc9ef2b167c3.json and https://artists.proofprofile.net/proofs/artist/3e471f12-5d4f-4e26-aec1-dc9ef2b167c3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.