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 0x06a029a6f906a16570d7a245329a7cde4678bc2f7d745115c2a741b7b2c15cd8. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7c5bf85-51dc-4572-bacc-e1aab00c5a0a.json and https://artists.proofprofile.net/proofs/artist/f7c5bf85-51dc-4572-bacc-e1aab00c5a0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).