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 0x1e7d1bb90f6e180185affc7e4bc4375a4f3290f6aef1a043a4063530da3ccc32. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5488b8e6-49a2-4ebd-8a32-568edfad30f1.json and https://artists.proofprofile.net/proofs/artist/5488b8e6-49a2-4ebd-8a32-568edfad30f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).