thumb|Image of Jacqueline François Jacqueline François (real name: Jacqueline Guillemautot; 1922, Neuilly-sur-Seine – 2009, Paris) was a French singer. She was very popular in after-war France and wa
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 0x06a81dd81bce386445c62fafcf3f3366cf6ecbda6481c936fddf36911cf5b911. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42bb9b58-02b8-4dc4-a6c1-241868f470b8.json and https://artists.proofprofile.net/proofs/artist/42bb9b58-02b8-4dc4-a6c1-241868f470b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le monde de la chanson: Jacqueline François, Vol. 2 "Mélodie perdue" (Remastered 2015)
Le monde de la chanson, Vol. 30: Jacqueline François, Vol. 4 – Paris et la Seine!
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 0xb2c2cb3c4699f03390cdf28e49caa41769a4ba8a4719a6fbf09dece74665aef7. 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/DEUD92059388.
Les grandes dames de la chanson française : Jacqueline Francois, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336a38de130d53b36e0971adaf7b6129ea3507c48aabdec6f828b4d17d239d58. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRUM71501195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3959957ba5d93df2d9d6be592a2b0cc3f56126bd72a5038ac766b08e190eb0b3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRZ035500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a5b1e6bfb026eda7cc6042ade90a695f290e3696f22647f29ea3129bc62ef0. 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/FRZ035500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e88e17862116dc1949ab0cf27228c0e7d92dc452a6eb733ff6189d8f7cdbc4. 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/FRUM71501198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f1b53b2aa91ce939dd603e25147186e6c1cf07ef1c7dd06f5b49693701ad48. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRZ035703210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fb24d8ef2e631e7d21ff415309e6a027df9e2e8d7c8d8458904561e352af82. 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/FRZ035703220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a6c1c0241bb6d48cccaa196d464a03d98418cca8c32555d3aa2b70166e37d5. 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/FRUM71501201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12640ba816e4b38e7f3f38195f6598e41f1a0092ebda0104f8dafabf44c0830a. 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/FRUM71501202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44712f98d54db7a66ad7b48e579ab448e220ef66f527407f1eeb7791ee0b772a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ035500320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e47f0292f841b3cb18152a6776471a0c509b0359e4ec4fd2c4d67caad60a7. 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/FRUM71501203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2e2aec9791456c2a97b14c80172e5f9f68eefde17194c13da3d7de2876e9e6. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FRUM71501194.
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 0x62c389914dc0a537194cef2b1460d4b2ec3362a593025b7cba4ad3e54f7abb63. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRUM71501196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2bb2f4c6fd07a0d8c1811ce48f6f6335b2525746d9166c5ffcaf5b219f836d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRZ036204750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7c1bb01af08210b8b154f7b2476ca9b1dbbeccc7087483db7c0990dfe869f6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRZ036201160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d8703231a9937b8f3a8ba9363ab0d2d22b350c2a87c9baac40edaca71d7b42. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRZ036000310.
Le monde de la chanson: Jacqueline François, Vol. 1 – "Où vont les fleurs" (2015 Digital Remaster)
Jacqueline François At the Plaza: New York, 1960
L'Essentiel de Jacqueline François (Mono Version)
Jacqueline François en 50 titres (Mono Version)
Du Music-Hall aux Années 60 (1950-1960): Jacqueline François, Vol. 15/43
Jacqueline François : Mademoiselle de Paris (Histoire Française)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53164fb73b13d93e96259e2d60c1032fccf94f56ff9c55e2b1f76ca388baf6ab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR6V84800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a3bcf662ea830684daadf3c9b1ab4ab954625ee42d24462338ea301e5928f2. 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/FR6V84900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45265602374082ac470709a16f70121d21908a2e4ff7620547161609f031020d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:25Z), 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/FR6V84800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc117005d900dfa882d75e1bfac6ca0fa7bc7721693705e0949ab4c9fb073de44. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR6V85000016.
Vintage Music No. 76 - LP: Jacqueline François
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb186d5c7f87bfbe1f593222aaf0072e7108e07ddbf02c738cb7e2f1608f27c11. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA371081777.
Les lavandières du Portugal, Vol. 5 (Collection "Légende de la chanson française")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d494d36814abda7c0f13ec7c6555b9db862f0844b141326c99e5bed4e327b83. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRW110800478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146279f5b95174f53ea39af379b511e365141ebfe203700ba5ba81fcf6b8b08d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FRW110800464.
Moi je dors près de la Seine, Vol. 4 (Collection "Légende de la chanson française")
Tu n' peux pas t' figurer, Vol. 3 (Collection "Légende de la chanson française")