Delois Barrett Campbell & Barrett Sisters
{"copyright_id":"0xf1ff715e0bff1c89e6694e7bd6d075ae265c1d48fdefc970ddbfd2fdf22dbde4","name":"Delois Barrett Campbell & Barrett Sisters","registered_at":"2026-06-20T13:36:54Z","symbol":"NIM1622068","token_address":"0x69e9e01bcaf225bc1d3b7f8ee28900fcd9e42b99","type":"artist","uuid":"b2954fb6-4b2e-476b-87c6-d6e65b070e09"}
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 0xf1ff715e0bff1c89e6694e7bd6d075ae265c1d48fdefc970ddbfd2fdf22dbde4. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2954fb6-4b2e-476b-87c6-d6e65b070e09.json and https://artists.proofprofile.net/proofs/artist/b2954fb6-4b2e-476b-87c6-d6e65b070e09.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).