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 0x2dfffba90a80bd02a9c385c55f35ff53d94c13ff46c4cf9afd9e486a0e4f7ba9. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19380f51-81ec-4bd6-a532-844eaa25020c.json and https://artists.proofprofile.net/proofs/artist/19380f51-81ec-4bd6-a532-844eaa25020c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Playwright Library of Sounds vol.1 -solo works at home-