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 0xab48442d374ff8dc38b9f29a21e401f57bfc6dcca74284dfbb131fa55ea47b18. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b757ff62-f9d0-4581-ab1f-b156178b2cf5.json and https://artists.proofprofile.net/proofs/artist/b757ff62-f9d0-4581-ab1f-b156178b2cf5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Christelijk Urker Visserskoor "Crescendo"