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 0x3ad66d386feb6fb707bbe9344cd48422b8baa9cbe7289d0e7f24e45b3b87ad60. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/945f1f6f-1f6d-4ed4-8174-7aab1d2ce724.json and https://artists.proofprofile.net/proofs/artist/945f1f6f-1f6d-4ed4-8174-7aab1d2ce724.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).