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 0x016b515d3b0e54b1770a15785ca2ff5a1213fdde446932e8f5a801c6734a1df7. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afa29e1d-5e1a-423d-8d31-174d5da0e50e.json and https://artists.proofprofile.net/proofs/artist/afa29e1d-5e1a-423d-8d31-174d5da0e50e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).