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 0x4aa6ab161ba1abc9e89769be487898aa4e16aeac208e3dbd1f0d1612d2894796. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26c7cdb2-14f9-4c6a-a825-43b1d81c4070.json and https://artists.proofprofile.net/proofs/artist/26c7cdb2-14f9-4c6a-a825-43b1d81c4070.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).