Boris Isaakovich Kuschnir (; born 28 October 1948) is a Soviet-Austrian violinist. Background and early life Born in Kiev in 1948, he studied violin with at the Moscow Conservatoire and chamber musi
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 0xce8f20bc03ebd762e5435de8960451cf449c481672c6fbe7a4eb1e9a36a724c4. 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/72d00ea5-aaa0-4d46-a95a-ce0d286e02c8.json and https://artists.proofprofile.net/proofs/artist/72d00ea5-aaa0-4d46-a95a-ce0d286e02c8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Études-Caprices for 2 Violins, Op. 18: No. 2 in E-Flat Major
Paganini: 24 Caprices — Caprices by Berlioz, Cervelló, Kreisler, Ortiz, Saint-Saëns, Sarasate, Wieniawski
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c415a33346edbebc55b987e049031bcd84b8ef947a3b4133e6797c7db5c606. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962401800.