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 0xd202df0b9e9e27ba6b57439b72d2ffe21c7caacfc2a08d1096c909c6a0068802. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/390d0a4b-f0f1-40d1-b163-5f533fc695dd.json and https://artists.proofprofile.net/proofs/artist/390d0a4b-f0f1-40d1-b163-5f533fc695dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).