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 0x3173ce9d2ae493ec5fe74a5877a2e1c6a76592b3b02543a1863dcf1fd0558489. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fc4c6b6-f8f3-4a09-8813-d4e685b9ab29.json and https://artists.proofprofile.net/proofs/artist/6fc4c6b6-f8f3-4a09-8813-d4e685b9ab29.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).