1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910d36f847aae9720735e00999536e21326c3493b6ebe962771b1d9bb8bdc8a7. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c88f6f3-5d8e-48a6-9579-78f43c6d3404.json and https://artists.proofprofile.net/proofs/artist/7c88f6f3-5d8e-48a6-9579-78f43c6d3404.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mister Percussion & Footlight Percussion. A Stunning Achievement in Sound by Terry Snyder and the All Stars