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 0x960939e39d26ccbd2557e2e59f51edba7f2e2a3bfe4b235461e83d0385ccf8b1. 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/52feb23e-e865-416b-8f6c-b14aad688d7a.json and https://artists.proofprofile.net/proofs/artist/52feb23e-e865-416b-8f6c-b14aad688d7a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).