{"copyright_id":"0x0bfccd22e82131afc4b8cf47d37ff60e0b72d8835dda4f911beed444d5b7dbbd","name":"Tomasz Chyła Quintet","registered_at":"2026-06-20T22:10:25Z","symbol":"NIM1730049","token_address":"0x698f296cfb24cbc56fef9fe20ba13ccc8ac694b2","type":"artist","uuid":"c912b2eb-6292-4c82-bdb2-c2726e0e35fe"}
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 0x0bfccd22e82131afc4b8cf47d37ff60e0b72d8835dda4f911beed444d5b7dbbd. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c912b2eb-6292-4c82-bdb2-c2726e0e35fe.json and https://artists.proofprofile.net/proofs/artist/c912b2eb-6292-4c82-bdb2-c2726e0e35fe.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.