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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf509c6fd49ae7a84ae48d479a67a208b19517fe83d22096ded0a904fe40e3bb9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d8a1c2b-14e4-49d4-bcaa-6bddd51b77ae.json and https://artists.proofprofile.net/proofs/artist/1d8a1c2b-14e4-49d4-bcaa-6bddd51b77ae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).