Pierre Louis Bernac (né Bertin; 12 January 1899 – 17 October 1979) was a French singer, a baryton-martin, known as an interpreter of the French mélodie. He had a close artistic association with Franci
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 0x4a3aff010f181e4957068234811342e4152973b56fecaf49946782f7132da9c4. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3f37e8a-e4c0-4895-9515-24209d4b5921.json and https://artists.proofprofile.net/proofs/artist/a3f37e8a-e4c0-4895-9515-24209d4b5921.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Poulenc-Un bal masqué-Sonate pour flute-Elegie pour cor-Trio pour piano hautbois et basson
Quatre Poèmes de Guillaume Apollinaire, FP 58: I. L'Anguille
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 0x2c53dbe9042f4b3fc4e356cf48224a87c89050c0d0d4f8bf092bcb9f2a38505c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM15000268.
Quatre Poèmes de Guillaume Apollinaire, FP 58: II. Carte postale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7aae7729aa28ed1bca56b3d853f8064045536ab05e67a0e6232b58799234b7b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM15000269.
Quatre Poèmes de Guillaume Apollinaire, FP 58: III. Avant le cinéma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa143aba1a61d98294297cc4904cef4267c1e99f8ace24f9318bd96a2d955bbad. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSM15000270.
Quatre Poèmes de Guillaume Apollinaire, FP 58: IV. 1904
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57be95ded1652642a819266f02dad76b026f00d91721fe98e1df3d587b0f10c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM15000271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdbf3c8aab0ea3d218de7424f25600499831d29e5da2a87ef452fc79f4beed2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM15000272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd92ecfc5a673cd086421659ecec154a74acf0de107ee2f908a701fe4fe6a95c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USSM15000273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321e3af122836a4aadbaa5d017d5015413f1ad99c5f4c862f75689c55d423cd6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSM15000274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8aea68ff9c5695caca71639b993cf39ccf6e05dfa6f467b7e194864986225e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USSM15000275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aedddd1147ce7f8be4942b05e04615b0f31f45e0028239442f86c6a49773906. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USSM15000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6af9843ad816bc8430bf4b0c49f4f062dbeb554b49bead8aacf2d6eeb236a3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USSM15000281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043098601c9ee4b42d6210e1fdd166f65f20246f23d3b94a2f2b51445093ff9b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USSM15000277.
Calligrammes, FP 140: V. La Grâce exilée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4292b10c4d028fc3736d6105ccf994ee83861ae8bc6ebdae6bcba6953eb632. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USSM15000278.
Calligrammes, FP 140: VI. Aussi bien que les cigales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518c09da191f8903c782d75ab132cad46ce16254f336a92314982a61d5705984. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USSM15000279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb152e36ddc40bd58519f016583724be32cac79680dd6df1e51fa9f02f04996b9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USSM15000280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebacb03516f36a259b70e9ee78e3daa3f88abaf1ddf0c1895f5eb1e8d87b1286. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USSM11200738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759829685eb8f159304ebfdb27d2ea3bbbd2b4567e55a574d19c80b1500141fc. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USSM11200739.
Trois mélodies: L'Échelonnement des haies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e97a46b788dbdc5a2174d8ce35b9499510c83b485148217b42a0aab6e77e170. 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/USSM15000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa331fe1623fc9bf3e5a4dc0de7c7421dc8a38bcfc5440a08e4fb5ae956d907f4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USSM15000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932beabc6dd33191740e427ba7f79f29769d3341e7450535b449732a77b937c6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USSM15000292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6473bf65b34e79cefc194b06777e49d1e6c0e2e7f3b8d362d2928127fef3bbee. 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/USSM15000293.