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 0x6c265b9fd4621b823a0ad5e2a26452d95b1f053487f727f7c4d909482bcdc784. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af54bd5b-22a6-4689-ac9a-b4b406ac12d1.json and https://artists.proofprofile.net/proofs/artist/af54bd5b-22a6-4689-ac9a-b4b406ac12d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).