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 0xc28f681e48bb6e0bfdbda7efa6b0903815fd9f4bd60f0f0d0c4ccc4fc6a362ac. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f17820d0-5e5d-429d-a3ab-8318b15f601e.json and https://artists.proofprofile.net/proofs/artist/f17820d0-5e5d-429d-a3ab-8318b15f601e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).