Joseph Gustaf "Sharkey" Bonano (August 9, 1902 – March 27, 1972), also known as Sharkey Banana or Sharkey Bananas, was an American jazz trumpeter, band leader, and vocalist. His musical abilities were
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 0xd2902282dbd357eb412fcbda4a387be52cc78b1a261513c6164e5d83d01452bd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a968500-e87f-4405-ad3d-44d09ab774e3.json and https://artists.proofprofile.net/proofs/artist/5a968500-e87f-4405-ad3d-44d09ab774e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sharkey Bonano at the Municipal Auditorium 1949