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 0x573e38a885b4447ea2bcef45cfc08caeba50204996a1f0ae9e5ca130f5c0dfb3. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13c2ed20-3a36-4e3f-92b9-8de17e9ec28f.json and https://artists.proofprofile.net/proofs/artist/13c2ed20-3a36-4e3f-92b9-8de17e9ec28f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).