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 0x6d0de23f029fcada9c80c5b61ef63b79b578d1e69c1a6912574fbbfcccbf6f73. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3910b2a-af5b-40a4-8171-2edb6b92cad0.json and https://artists.proofprofile.net/proofs/artist/c3910b2a-af5b-40a4-8171-2edb6b92cad0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).