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 0x223847148c4f18a06b9dfaab3c3c24a4cf72fbd177fc5f33360a04cf691330c4. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e25a7167-d5bd-4223-8617-0e3b02d4419c.json and https://artists.proofprofile.net/proofs/artist/e25a7167-d5bd-4223-8617-0e3b02d4419c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).