thumb|Jacques Hélian Jacques Mikaël Der Mikaëlian better known as Jacques Hélian (born in Paris, 7 June 1912 - died 29 June 1986), was a famous French orchestra conductor for French music-hall. Biog
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 0xa5b92b7b98c2c2a5662eb0c47d705f9a05f32097b964c651c7d91fbff27af9e1. 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/6ca526ce-5021-4304-8967-c48c06d777e2.json and https://artists.proofprofile.net/proofs/artist/6ca526ce-5021-4304-8967-c48c06d777e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage French Song No. 153 - EP: La Vitrine Du Petit Bijoutier
Faut rigoler (feat. Vasso Marco, Les Hélianes) [Mono Version]
Etoile des neiges, Vol. 2 (Collection "Légende de la chanson française")
L'âge d'or du plus grand orchestre français d'après-guerre
Jacques Helian et son orchestre: Essential 10
The Very Best of Jacques Hélian et son orchestre
7 merveilles de la musique: Jacques Hélian
Les années music-hall : Jacques Hélian, Vol. 1
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 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 0x7d3dc7a24cedb0918d05b8acb4a88cdaef83c72af10e333ed8cd9529c0c900bb. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/FRM031205500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd68d935555d4059a15b33d56bafc61142d1811b8e4265e997a26baab2180a91. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRW110300203.