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 0x243c58a46ecdaf017ebb30a89c4e3bc74239379bead85d23d20b338b4ed3f03e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0452683-ea5c-4e24-b9a5-40b50b5c0ba6.json and https://artists.proofprofile.net/proofs/artist/f0452683-ea5c-4e24-b9a5-40b50b5c0ba6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).