Guy Touvron (15 February 1950 – 9 March 2024) was a French classical trumpet player and music teacher. He was an accomplished soloist, having played with some of Europe's leading orchestras. He premie
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 0x9caa0ff23a1dd790325799f98aaf43dbba7f4112ca97a4a498646d5c569f3de4. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf8b8e4b-af28-4bb0-b9d9-8baa81d424a6.json and https://artists.proofprofile.net/proofs/artist/cf8b8e4b-af28-4bb0-b9d9-8baa81d424a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto for Trumpet and Orchestra in D Minor, Op. 9, No. 2: I. Allegro e non presto
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 0xcce315fd47a8eb3e818ab39cd930c69e77eb8b1c138c2e4955ba83301c2706a4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TX1788104.
Concerto for Trumpet and Orchestra in D Minor, Op. 9, No. 2: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14133eb10c0aeb389fc0c00824023848bf4774123fc53cdc71bc31075c52e43b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TX1788106.