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 0xd6ac68da26f4529883a3d6c9dbb445df06f39dbfdd73a049527c38c50d8caba0. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f963ea1e-e18c-4bf2-b7fd-1412dc47d6dc.json and https://artists.proofprofile.net/proofs/artist/f963ea1e-e18c-4bf2-b7fd-1412dc47d6dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).