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 0x3d287bf24216b38f15d203a78ad5d44b0491c2157676a827a3712603b4aafb08. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3ce13b6-5db4-4ffd-bb0f-845ed284fc5f.json and https://artists.proofprofile.net/proofs/artist/c3ce13b6-5db4-4ffd-bb0f-845ed284fc5f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).