Sébastien de Brossard (; 12 September 165510 August 1730) was a French music theorist, composer and collector. Life Brossard was born in Dompierre, Orne. After studying philosophy and theology at Ca
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 0xdcf180563aa60a5fbd944f68e77ccfa052d302354ebf46dcabd7c5f8047ca4df. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc807411-27af-40f9-9473-f4ec34ec97da.json and https://artists.proofprofile.net/proofs/artist/dc807411-27af-40f9-9473-f4ec34ec97da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Charpentier: Messe de Minuit - In Nativitatem Domini Canticum
In Nativitate Domini N[ost]ri Jesu Christi Canticum, H. 421
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 0x9f76d55568bc680d58c236e56dd5f06273b95e53e2a6c8f5c7a9767ec93b7105. 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/FR7JM2293040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb19c9c70d9d6178427b42804d1b43b51d838d711620e9741a4d353ab0752cc7. 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/FR7JM2293070.
Noël sur les instruments, H. 531: Laissez paître vos bêtes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68642b5c2d5725228a922bda2288437d51345bb1b03706c8a72e0de4746a21b3. 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/FR7JM2293100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafee4892ff39297f79ec807d3e20fcce6b49402278f3dcac4e0a62e1306d3dc4. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR7JM2293010.
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
Charpentier : Méditations pour le Carême
Trio Sonata in G Minor: II. Presto - Presto - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6a3300861fc5ca6bedf25c43842099d61563411212404c7831bb87eab0625c. 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/FR9W11906188.
Le Reniement de Saint Pierre , H. 424: "Ecce Judas"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c54dc0abc89564440c1b9ccc5dca8e63a3fd490a8ec501d2201f079e7060b9. 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/USHM11458803.
Le Reniement de Saint Pierre , H. 424: "Tunc respexit Jesus Petrum"
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Mozart: Requiem in D Minor, K. 626: VIII. Lacrimosa
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Pierné: 6 Pièces posthumes: No. 1, Prélude sur le nom de Paul Dukas, pour son tombeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31defd463ff928654a1318d9e3ed29c6f9db394dec1630c258dcc9d97099a9f. 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/FRZ112200102.
Fauré: Requiem, Op. 48: VII. In Paradisum
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Purcell: Funeral Sentences: Thou Know'st, Lord, Z. 58C (First Verse)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a00d8a7a75ce5a988e3d084d7df4826ea174742760262362fed3bf3e887cd05. 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/GBAYC9103808.
Duruflé: Requiem, Op. 9: VIII. Lux æterna
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Schubert: String Quartet No. 14 in D Minor, D. 810 "Death and the Maiden": II. (b) Variation I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1753b9107acf6ee07ee28cb7d3b88fddcb3900e4e9eb1242146aceb9d98f19e5. 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/GBAYC1902592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f868fdb9a4fb5fef58351180ecd79bc63f5982b5cbf39898191b414feb824b. 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/GBAYD1100153.
Walton: Henry V: Passacaglia "Death of Falstaff"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9003230ffdf4c76022e9d63ac6f85f7329857ab65a141028e69d24482adb4c2. 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/GBAYC8704561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf07727189e7fd33c22819a3053e35d158f4a9094ab130226ff9b2fa81c86e2. 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/FRZ207905206.
Schuman: Carols of Death: No. 3, To All, to Each
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89670d2d3b280cced516f5a4a8bccf934225cec730049729a98a0e54e8095cfc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYD9000224.
Charpentier: Messe pour les trépassés, H. 2: V. Symphonie - Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e21c70cb87a414ea6494ad8b60f9d3d6997bd4713528945e086b5e8328afc4e. 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/FRZ207309009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55a6002b0d3c15cbf4ee25065328528c744f596ac0923a50097e0a24283bd60. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRZ208607122.
Debussy: 6 Épigraphes antiques, CD 139b, L. 131: No. 2, Pour un tombeau sans nom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e9e282a3276844fefffd738a378904602e582966e002c11f41d9da7222d753. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRZ110902282.
Brossard: Troisième leçon des morts: IV. Symphonia. "Memento, quaeso"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e7817d2bf6fe0a7982e8e4f051ef6e96feb8b8d539d0c10fe5f1faeb48391e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRZ119602440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c68507a95146db5ae9cda9456c7fcc1a4a1695e62e7c75a473382bec0fa0b0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBAYC9104491.
Satie: 3 Mélodies de 1886: No. 2, Élégie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e021592c6714fcad8ba3521c49c17be522f6fd933139c196a2df1a141e87b60. 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/FRZ110902434.
Ockeghem: Missa pro defunctis: I. Requiem aeternam
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Biber: Requiem a 15 in A Major: VI. Agnus Dei
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Vivaldi: Concerto funebre in B-Flat Major, RV 579: I. Largo
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Bartók: 14 Bagatelles, Op. 6, Sz. 38: No. 13, Elle est morte. Lento funèbre
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Grieg: Peer Gynt, Op. 23, Act 3: No. 12, The Death of Åse
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ad41a5b940e6ae15d86939dcdb99ed8814f3596c68dc80794d5cab6464fc4b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRZ209216407.
Elgar: The Dream of Gerontius, Op. 38, Pt. 2: Andantino
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9882a63f1e5c1dce515ac77f73cb290d4719d274e4caf9dbced50fbd976f73. 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/FRZ119603940.
Ravel: 2 Mélodies hébraïques, M. A 22: No. 1, Kaddish (Transcr. Siloti for Piano)
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Visée: Pièces de théorbe, Suite No. 10 en ut mineur: Allemande, tombeau des Mesdemoiselles de Visée "La plainte"
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Handel: Israel in Egypt, HWV 54, Pt. 1: Chorus. "The Merciful Goodness of the Lord"
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Strauss, R: Don Quixote, Op. 35: Finale. Death of Don Quixote
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfb547a9c68cfed72ffdc84d6c0cf4b64f532f5ec5b54c45d6ab8ba865a677c. 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/FRZ208908100.
Prokofiev: Suite No. 3 from Romeo and Juliet, Op. 101: VI. The Death of Juliet
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Bach, JS: St John Passion, BWV 245, Pt. 2: No. 39, Chor. "Ruht wohl, ihr heiligen Gebeine"
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Chopin: Piano Sonata No. 2 in B-Flat Minor, Op. 35 "Funeral March": III. Marche funèbre. Lento
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Rachmaninov: Vespers, Op. 37: IV. Svete tikhiy
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De Brossard: Œuvres chorales pour Bossuet
Stabat Mater, SdB. 8: II. Cujus animam gementem
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c78999bdce3f61dead1a0d6e83ac1e7b650984f63df683143733f87a88ae36. 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/FRZ131419060.
Une nuit de Noël (Orgue J. Boizard Saint Michel-en-Thiérache)
Brossard : Cantates spirituelles & Sonates d'église
Ténèbres : A Representation of the Tenebrae Service
Westeuropa zwischen Barock und Rokoko: Serie B. Am Hofe Ludwigs XIV & Serie D. Kammer- und Cembalomusik bis zu Rameau (Mono Version)
Flute Concerto in C Major, Op. 7 No. 3: III. Allegro
Konzertgruppe der Schola Cantorum Basilensis
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Brossard & Grigny: Petits motets et hymnes (Arr. for Voice and Keyboard)