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 0x743465f7269ecaddf55fb86c947e5bf5cf41e9e7eae4955437609f779b89ebe1. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2643a621-0f0b-448a-b412-89f7bbcd1c8b.json and https://artists.proofprofile.net/proofs/artist/2643a621-0f0b-448a-b412-89f7bbcd1c8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).