1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55529f79ac39df47fb57e31f819d8c1d8cce6478ae78e3a0428aba25024b200. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3468f28a-ec31-4e8d-b063-69dfd5a59c8e.json and https://artists.proofprofile.net/proofs/artist/3468f28a-ec31-4e8d-b063-69dfd5a59c8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).