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 0x34481bf4dd8dbc9101312e1dc250bb2862965166ad1678d0868d2e2093b458bf. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8440cada-0cc1-4ecf-865b-d3e8de50e5b9.json and https://artists.proofprofile.net/proofs/artist/8440cada-0cc1-4ecf-865b-d3e8de50e5b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).