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 0x0cfbdab5cf3d90f418ab50110c74bc7b944a0c949d8cf24cd21bfc40a7a8254d. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f2c8217-2b30-4970-81eb-5c6c738ea702.json and https://artists.proofprofile.net/proofs/artist/2f2c8217-2b30-4970-81eb-5c6c738ea702.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).