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 0x1908d44cecf5c414c12c1686a9ff48e8e76192f4a2f89eeb07b066196ec87ad4. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f19d2ba9-fb7f-499f-877b-0f2e0383c8d0.json and https://artists.proofprofile.net/proofs/artist/f19d2ba9-fb7f-499f-877b-0f2e0383c8d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).