Blandine Verlet (27 February 1942 – 30 December 2018) was a French harpsichordist and a harpsichord teacher, who is known internationally for her recordings of works by François Couperin. Career Bo
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 0xde67c8c09d33dac06f8c46d2c0c64428367cc03a034a528c987f2e4c5874d9b2. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fab059db-c960-4512-800c-836cff371c14.json and https://artists.proofprofile.net/proofs/artist/fab059db-c960-4512-800c-836cff371c14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
J.S. Bach: Italian Concerto BWV 971, French Overture BWV 831, 4 Duettos BWV 802–805
J.S. Bach: Inventionen und Sinfonien, BWV 772–801
Duphly, Balbastre: Musiques pour les Princesses de France (Vol. 2)
Duphly, Balbastre: Musiques pour les Princesses de France (Vol. 1)
Couperin: Pièces de clavecin, Troisième Livre
Pièces de clavecin, Livre III, Treizième ordre en Si Mineur: I. Les Lys naissants
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 0x9c8f2630ddef30c275fd7154493af0b630e5a8721df3084ffb4f7908e5f821d7. 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/FROV61717001.
Pièces de clavecin, Livre III, Treizième ordre en Si Mineur: III. L'Engageante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0775eafc44db897377fb7b74a6f4677dcf3317f1d0d68e5f785acedd917478c9. 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/FROV61717003.
Pièces de clavecin, Livre III, Treizième ordre en Si Mineur, les Folies françaises ou les Dominos: I. La Virginité sous le Domino couleur d'invisible
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c718f649785bbbcafec8e751a447869c05bae0c037344e9964d6bea0571e1e. 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/FROV61717004.
Pièces de clavecin, Livre III, Treizième ordre en Si Mineur, les Folies françaises ou les Dominos: II. La Pudeur sous le Domino couleur de rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f46285533b0c6f0e32658232a023bd6c74256e9aa7ff2c1c91a3fce272579c. 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/FROV61717005.
Pièces de clavecin, Livre III, Treizième ordre en Si Mineur: II. Les Roseaux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fb89b58ac62aa9dc6d3045ab40ed9c75a805fbba4a5abdf81fd6001777b106. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FROV61717002.
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
Pièces de clavecin, Livre III, Treizième ordre en Si Mineur, les Folies françaises ou les Dominos: IX. Les Vieux Galants et les Trésorières surannées sous les Dominos pourpres et feuilles mor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6306bcba700d2d105fad6aff8cb1b3106cb48a3d9f2662cc2f17b85dfd4009ed. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FROV61717012.
Pièces de clavecin, Livre III, Dix-huitième ordre en Fa Majeur: I. La Verneuil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d69d9c4636258f01c510e237a42b57823b4498d2ffcd353624d23ef86793ca9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FROV61717017.
Septième ordre (Deuxième livre): I. La Ménetou
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ff0eb17a64febd0dafefdb93e78a8d6ab4363b22989760610ecd1eb4988fd8. 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/FR0V61203601.
Jacquet de la Guerre: Les pièces de clavecin
J. S. Bach: Le clavier bien tempéré, Livre II
Bach: Le clavier bien tempéré, Livre I (Clavecin Hans Ruckers II 1624)
The Well-Tempered Clavier, Prelude and Fugue No. 1 in C Major, BWV 846: II. Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9654fc7f4fd82aa600fad39a2d126ff6f3a6b23972cd028a48b07fee567c0b3. 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/FRX201666224.
The Well-Tempered Clavier, Prelude and Fugue No. 4 in C-Sharp Minor, BWV 849: II. Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2c6b9a5c864608e99cc44301f733f045e232cc8dfc46b9cfc8773c5570cec4. 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/FRX201666230.
The Well-Tempered Clavier, Prelude and Fugue No. 5 in D Major, BWV 850: I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3532a37a4a7f30260aabdb84bcaebe1f3d4a19d0df6d7fe7ffae2c0f6d72cf13. 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/FRX201666231.
The Well-Tempered Clavier, Prelude and Fugue No. 5 in D Major, BWV 850: II. Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029ba947f8c3f4f006a4fdf8ffd78be79e52e31815530e5c29dffa058ad3e5e0. 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/FRX201666232.
The Well-Tempered Clavier, Prelude and Fugue No. 6 in D Minor, BWV 851: I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7cdd97162ed31ffdc8850d26e92a5312ee4e9a366b3ab727cf769798026563. 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/FRX201666233.
The Well-Tempered Clavier, Prelude and Fugue No. 10 in E Minor, BWV 855: I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070377fd5f30311d1cb6b31b87006a7f9f0819c1db3b988fee210a2565fb43f6. 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/FRX201666241.
The Well-Tempered Clavier, Prelude and Fugue No. 1 in C Major, BWV 846: I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6fb1b45e9f5d4000cb23302752e8a187684a12e26123e0ae1a632bdc7f1726. 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/FRX201666223.
The Well-Tempered Clavier, Prelude and Fugue No. 2 in C Minor, BWV 847: I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194550d41b6063589e1bc35fb85d9f11698da3411fcb710d7238e652cae8bbb2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRX201666225.
The Well-Tempered Clavier, Prelude and Fugue No. 2 in C Minor, BWV 847: II. Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e23ee1cef9c9287f910f250012fe309cde273c7afbf716ae6ef6f33c43a5ea7. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FRX201666226.
The Well-Tempered Clavier, Prelude and Fugue No. 3 in C-Sharp Major, BWV 848: I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0921a7389cf13a4df06bb6ab18831e7d2a4d68be4fe751ac42618809a0796719. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FRX201666227.
The Well-Tempered Clavier, Prelude and Fugue No. 4 in C-Sharp Minor, BWV 849: I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff21b3bda5f237969c8b36e828bff19db28aed7202a3788444e306570caa403. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRX201666229.
The Well-Tempered Clavier, Prelude and Fugue No. 6 in D Minor, BWV 851: II. Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1cd48337e35b26032f4e463d3d7602310294290fbe8465385aca6b3b04daa9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRX201666234.
The Well-Tempered Clavier, Prelude and Fugue No. 7 in E-Flat Major, BWV 852: I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e752ae592296537b3f8d37c3b7523d52b2eba82c236d0444fe93ad8575aefb. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRX201666235.
Les pièces de clavessin de Monsieur Louis Couperin, Vol. 5
De La Barre: Pièces pour la flute traversière
Suite V du premier livre in D Minor: VI. Rondeau. Le Provençal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784d52ee2ef079c9be9b538fb6365ed1147e274966b5900c49def72aad9f41bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR10S1718710.
Suite IX du deuxième livre: Sonate. L'Inconnu in G Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af8593f66a672f2a4d7d5acd2a094aa4a29d81584927929695c8bf03041b6d6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR10S1718711.