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 0x766f976550dbfa23c3a9ff587c2d1eba03dbf4c5f2ad2f09e29446069aa7ed20. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04d95ba2-e988-4468-bae0-6bcb06edb668.json and https://artists.proofprofile.net/proofs/artist/04d95ba2-e988-4468-bae0-6bcb06edb668.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).