Jeff Gauthier is an American violinist who works with classical, jazz, new music, and free improvisation music. He is also active as a music producer and nonprofit consultant. Life and work Violini
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 0xa287ce4dad7eeb174cf5f1cbd0da7da2dbdf8762fb0fab07acacb2ad7aad172e. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c2654eb-91aa-49f6-9697-5710a320b79b.json and https://artists.proofprofile.net/proofs/artist/4c2654eb-91aa-49f6-9697-5710a320b79b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.