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 0xbf705105e28a182a3bfdc6c0a91a6f11f6f01064c697bd03703832f93f7a30b3. 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/64d9b1c8-c4a5-49f8-9a93-0d1712b97a0d.json and https://artists.proofprofile.net/proofs/artist/64d9b1c8-c4a5-49f8-9a93-0d1712b97a0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).