Alex Jacobowitz (born 19 May 1960 in New York) is a classically trained concert artist and street performer who plays the marimba and xylophone. New York During the early 1980s he studied music at th
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 0x14c0623bd87c43ad6cf6275880b6e16eead752e4d9221cd12e0a48c243e2ab62. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cae5d0fe-e1bc-48a6-86a7-fe386539d529.json and https://artists.proofprofile.net/proofs/artist/cae5d0fe-e1bc-48a6-86a7-fe386539d529.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Art of Xylos: Falla, Tárrega, Mussorgsky, Bach, Couperin, Debussy, Satie, Smadbaek, Mozart & Schumann
The Art of Touching Wood: Music of Johann Sebastian Bach