{"copyright_id":"0xb59adba7f76419642c4df3ddceb281e4cd79f88478ce3f7d8854b57be94ee02c","name":"Xeremiers Tomàs Salom i Miquel Tugores","registered_at":"2026-06-21T18:42:51Z","symbol":"NIM2002914","token_address":"0xe91f83ca0fbde355a2b0a65273dddf4ae6b9ed7c","type":"artist","uuid":"ff7d5db4-0793-46d5-94dc-7443b295d5aa"}
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 0xb59adba7f76419642c4df3ddceb281e4cd79f88478ce3f7d8854b57be94ee02c. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff7d5db4-0793-46d5-94dc-7443b295d5aa.json and https://artists.proofprofile.net/proofs/artist/ff7d5db4-0793-46d5-94dc-7443b295d5aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).