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 0x98aaa598a6f2a05e3312739b8dba62500f757cf55b8c291ef8265626c7e4c514. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc1f3dd8-f188-4b3d-bbe3-4bcce5a286ec.json and https://artists.proofprofile.net/proofs/artist/cc1f3dd8-f188-4b3d-bbe3-4bcce5a286ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).