{"copyright_id":"0x932d9be7b6eb487e6dbc2705e75d6d19b683cac7cc1ff7e06afc7e34277afbab","name":"Miquel Ferrer i Romana","registered_at":"2026-06-17T10:33:58Z","symbol":"NIM1368289","token_address":"0xdc7447c8a08b05a895a7aef69ede7d6049adb0af","type":"artist","uuid":"80dc54f4-de2d-4354-be08-dcdf37e345b3"}
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 0x932d9be7b6eb487e6dbc2705e75d6d19b683cac7cc1ff7e06afc7e34277afbab. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80dc54f4-de2d-4354-be08-dcdf37e345b3.json and https://artists.proofprofile.net/proofs/artist/80dc54f4-de2d-4354-be08-dcdf37e345b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).