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 0x1773faf5cef48e67884615edf2bcfd09720ba022c4f2a747566a8619bc5a6196. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc83b602-607c-484e-b3d7-21c3a483fe9e.json and https://artists.proofprofile.net/proofs/artist/cc83b602-607c-484e-b3d7-21c3a483fe9e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
For the Men Who Died in the Cherry, Illinois Mine Disaster