Leonard Gaskin (August 25, 1920 – January 24, 2009) was an American jazz bassist born in New York City. Gaskin played on the early bebop scene at Minton's and Monroe's in New York in the early 1940s.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a827318334ed105901c895d033dd407acd0a8203524f04020e843cd6470478. 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/5cbfd862-523f-4ec6-8fe1-0169ccbe1f0f.json and https://artists.proofprofile.net/proofs/artist/5cbfd862-523f-4ec6-8fe1-0169ccbe1f0f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).