Jonathan Leshnoff (born September 8, 1973) is an American classical music composer. Early life and education Jonathan Leshnoff was born in New Brunswick, New Jersey to Susan and Steven Leshnoff; h
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 0x47c9712df05d1d33fbd7b379b9abec3fe59177581a35340f68f3ae3dc1017a42. 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/70022baf-28eb-465a-aa7c-597b566bf129.json and https://artists.proofprofile.net/proofs/artist/70022baf-28eb-465a-aa7c-597b566bf129.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Leshnoff, J.: Violin Concerto / Distant Reflections / String Quartet No. 1
Jonathan Leshnoff: Zohar & Symphony No. 2 "Innerspace"
Jonathan Leshnoff: Symphony No. 4 "Heichalos" (Performed on the Violins of Hope)
Jonathan Leshnoff: String Quartet No. 3 "Miller-Kahn"; String Quartet No. 4; Four Dances
Jonathan Leshnoff: Symphony No. 3 & Piano Concerto (Live)
Leshnoff: Violin Concerto No. 2: II. Very Slow "Chokhmah Yud"
Leshnoff: Elegy, Violin Concerto No. 2 & Of Thee I Sing