Cyril James Touff (March 4, 1927 in Chicago – January 24, 2003 in Evanston, Illinois) was an American jazz bass trumpeter. He was one of the few jazz musicians known as a bass trumpeter. He was also a
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 0x0c927d90d6797d97ad44b64aa2bd5393daa0cc1cd7a2d8f307d046554524bab9. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8f2e9ba-5e51-4d64-b90a-068b1a4f1001.json and https://artists.proofprofile.net/proofs/artist/f8f2e9ba-5e51-4d64-b90a-068b1a4f1001.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Cool Side of the City, Vol. 15 - Refined Jazz Grooves