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 0x33340ba7e5d97aa2e9c2562b4213224f89664d4c0a31247590d09e10f03d73b8. 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/52af6e4d-6f87-45ef-9b28-92cad62e1d22.json and https://artists.proofprofile.net/proofs/artist/52af6e4d-6f87-45ef-9b28-92cad62e1d22.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).