Pierre Joseph "Baro" Ferret (1908–1976) was a gypsy jazz guitarist and composer. He was known by his Romani nickname "Baro," which meant "Big One" or even "King" in Romany. Through his brother Jean "M
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 0xf64b0760beae95212a936dd033650f4530c9f43e72e423346ff6d2a75e2602df. 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/52b3e6c5-f76e-4877-a66b-c00e2a6621db.json and https://artists.proofprofile.net/proofs/artist/52b3e6c5-f76e-4877-a66b-c00e2a6621db.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les frères Ferret 1938-1956 : Baro, Sarane & Matelo, les gitans de Paris
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 0x4e2751b74d4eede49f43865d25cef81e594e35dad46b5a04fb415292b369cc3d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/FRX190902240.
La Musique Gitane de Paris : Les Frères Ferret (1937 - 1957), Vol. 1
La Musique Gitane de Paris : Les Frères Ferret (1937 - 1957), Vol. 2