Philippe Hirschhorn (11 June 1946, Riga – 26 November 1996, Brussels) was a Soviet violinist. He won the Queen Elisabeth Music Competition in 1967. A citizen of the Soviet Union, he was born in Riga,
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 0x4c115a3f9effe4d89cc24c3eee0516d42609bcb7e6ae62f131db4897823e0b77. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afedef05-6e0d-4e5b-a581-57b7881ff1ac.json and https://artists.proofprofile.net/proofs/artist/afedef05-6e0d-4e5b-a581-57b7881ff1ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Philippe Hirschhorn (1st Prize Queen Elisabeth International Competition 1967) [Live]