Antonio Carlos Jobim, Luiz Bonfá & João Gilberto
{"copyright_id":"0x6cb2fbffeca04440f4d9ef12b2737b6d1aab9461f0a6913ba0b0dbcf73d007fd","name":"Antonio Carlos Jobim, Luiz Bonfá & João Gilberto","registered_at":"2026-06-20T12:21:14Z","symbol":"NIM1611662","token_address":"0xb7b316cab51792c446a0591f2eae7305c4a7c627","type":"artist","uuid":"b174ff66-369d-4251-87c0-86db7feea3b7"}
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 0x6cb2fbffeca04440f4d9ef12b2737b6d1aab9461f0a6913ba0b0dbcf73d007fd. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b174ff66-369d-4251-87c0-86db7feea3b7.json and https://artists.proofprofile.net/proofs/artist/b174ff66-369d-4251-87c0-86db7feea3b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).