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 0x252674c03c85783df42d28a7c73a584e821a478fc8a06f62c0cc6959c1fde25f. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e94c3e1-8121-403f-8bd4-f252e15bf9c0.json and https://artists.proofprofile.net/proofs/artist/1e94c3e1-8121-403f-8bd4-f252e15bf9c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).