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 0x822ee5606aba64ef682dbe00a115aa87040225c8ea6df8fcdf74dab3aeceaf70. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fb06163-5c1d-440c-9b8e-ef038309269c.json and https://artists.proofprofile.net/proofs/artist/3fb06163-5c1d-440c-9b8e-ef038309269c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Famous Flute Concertos. Bach, Vivaldi, Mozart, Ibert, Jolivet, Khachaturian...
Hofmann: Flute Concerto in D Major, Badley II:D1: I. Allegro moderato (Formerly Attributed to Haydn as Hob. VIIf:1)
Kammerorchester des Saarländischen Rundfunks
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 0xdcfc43c6fdc1eceb166d766ab4adb422a5800e9d2a4d719baba17145c4f30776. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAYC1502565.
Hofmann: Flute Concerto in D Major, Badley II:D1: II. Adagio (Formerly Attributed to Haydn as Hob. VIIf:1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa18e606119e5c6c3d2f77f3a72d85376f11683e8631c25fd63306a39915e4b. 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/GBAYC1502566.
Hofmann: Flute Concerto in D Major, Badley II:D1: III. Allegro molto (Formerly Attributed to Haydn as Hob. VIIf:1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9fc301ac597c62c06cbf10f12ff4195cf6e1796b191ddda97644b176bec844. 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/GBAYC1502567.
Honegger: Concerto da camera: I. Allegretto amabile
Association Des Concerts De Chambre De Paris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c15383f943e428f158a843fb1fe3962c000743dfa59166513e394eacf61f97. 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/GBAYC1502441.
Mozart: Concerto for Flute and Harp in C Major, K. 299: I. Allegro (Cadenza by Flothuis)
Orchestre de chambre Jean-François Paillard
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1a26a4ade2f71439c79c6897c11d86b569cc7f2f6de1277b1c94c71662840e. 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/GBAYC1500143.
Mozart: Concerto for Flute and Harp in C Major, K. 299: II. Andantino (Cadenza by Flothuis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8da0e4a7f87259a10c01d39a20ced1e062f8c09ab13e4db625b1cf5c4cf69ff. 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/GBAYC1500144.
Bach, JS: Violin Concerto in G Minor, BWV 1056R: II. Largo (Transcr. for Flute)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9956375272e2bbcb8076c395513226bf18ccb876802685bd34d11675019ea26. 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/GBAYC1500239.
Bach, JS: Flute Concerto in A Minor, BWV 1041: II. Andante (Transcr. of Violin Concerto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb0562d6ab7126bcc3ba1e4a5bb68ce118d5b85d7876a9e40e9423f06c38975. 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/GBAYC1500242.
Bach, JS: Flute Concerto in A Minor, BWV 1041: III. Allegro assai (Transcr. of Violin Concerto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b76e741f5e6e15ab96d77172cddfa115eb49dd6396d388c1e5583241b8a2eca. 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/GBAYC1500243.
Telemann: Flute Concerto in C Major, TWV 51:C1: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1413b262f808316672e36e60f9764028e43997db30172b5e16edd35e0d52ffa0. 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/GBAYC1500244.
Handel: Flute Concerto in F Major, Op. 4 No. 5, HWV 293: I. Larghetto (Transcr. of Organ Concerto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250849bddacab3d548bfc8d293067043e06b12cd29c29e1b7171551c577877eb. 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/GBAYC1500197.
François Devienne, The Sonatas for Oboe and Basso Continuo Op. 70
François Devienne, Oboe Sonatas Op 70, 71 & 23
Devienne: Sonatas for Oboe and for Bassoon
Devienne, F.: Flute Quartets, Opp. 16, 66
Devienne : Quatre sonates pour flûte et clavecin
Michel Debost / flûte Orchestre de Chambre de la Radio Française / Marcel Couraud play: Fançois Devienne: Concerto No 2, pour flûte et orchestre
Flute Concerto in F Major, RV 433: I. Allegro
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Flute Concerto in F Major, RV 433: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9300fd8e49203559a01ea7c6a56e787b3a0383f6bd6b07e97ba54bb9eda37a2e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLY331703579.
Flute Concerto in F Major, RV 433: III. Presto
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Flute Concerto in G Minor, RV 439: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0ce5fa1c21a668edcf4c7cd9a3ec1127d51019ab9d557e3ab46d5c5322e767. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLY331703581.
Flute Concerto in G Minor, RV 439: II. Presto - Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89798987f07bd0727c75a97396a2d188581735fda05c9e81adcf0a87eee04815. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NLY331703582.
Flute Concerto in G Minor, RV 439: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9603b237e2b6ebabb8f5e25295d6bf10c19ca31966a8e478f98f6e99123ba985. 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/NLY331703583.
Flute Concerto in G Minor, RV 439: IV. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f25e9f0cea1d86a757a06bcf511e76e17de391e3980a207ad1a666da0565487. 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/NLY331703584.
Flute Concerto in G Minor, RV 439: V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a4123c55cb031497df1d539c5797df39e4c31c1dc7c5db5e98636da6f82767. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/NLY331703585.
Flute Concerto in D Major, RV 428: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892318053ac73ad08ae84668d2603f243ad4239c9918a2685cd8a05ec34a807f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLY331703586.
Flute Concerto in D Major, RV 428: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8e1333612fe03257a475cd2b33a406a00931ce03a0369dbbab69d0d617cf8b. 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/NLY331703587.
Flute Concerto in D Major, RV 428: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71beae539c561d51d771af67292196bce4c9534de0ce17831dcc9d7dcc9d0153. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLY331703588.
Flute Concerto in G Major, RV 435: I. Allegro
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Flute Concerto in G Major, RV 435: II. Largo
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Flute Concerto in G Major, RV 435: III. Allegro
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Flute Concerto in F Major, RV 434: I. Allegro ma non tanto
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Flute Concerto in F Major, RV 434: II. Largo cantabile
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Flute Concerto in F Major, RV 434: III. Allegro
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Flute Concerto in G Major, RV 437: I. Allegro
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Flute Concerto in G Major, RV 437: II. Largo
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Flute Concerto in G Major, RV 437: III. Allegro
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Flute Concerto in G Major, WK 50: I. Allegro
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Flute Concerto in G Major, WK 50: II. Adagio
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Flute Concerto in G Major, WK 50: III. Presto
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Flute Sonata in C Major, WK 123: I. Adagio
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Flute Sonata in C Major, WK 123: II. Allegro
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Trio Sonata in G Major, WK 80: I. Vivace
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Trio Sonata in G Major, WK 80: III. Menuetto
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Vivaldi: Flute Concerto in F Major, Op. 10 No. 1, RV 433 "La tempesta di mare": I. Allegro
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Vivaldi: Flute Concerto in F Major, Op. 10 No. 1, RV 433 "La tempesta di mare": II. Largo
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Vivaldi: Flute Concerto in F Major, Op. 10 No. 1, RV 433 "La tempesta di mare": III. Presto
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Poulenc: Flute Sonata, FP 164: I. Allegro malinconico
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Poulenc: Flute Sonata, FP 164: II. Cantilena
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Poulenc: Flute Sonata, FP 164: III. Presto giocoso
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Handel: Flute Sonata in G Major, Op. 1 No. 5, HWV 363b: I. Adagio
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Handel: Flute Sonata in G Major, Op. 1 No. 5, HWV 363b: II. Allegro
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Handel: Flute Sonata in G Major, Op. 1 No. 5, HWV 363b: III. Adagio
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Handel: Flute Sonata in G Major, Op. 1 No. 5, HWV 363b: IV. Bourrée
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Handel: Flute Sonata in G Major, Op. 1 No. 5, HWV 363b: V. Menuetto
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Bach, JS: Flute Sonata in B Minor, BWV 1030: I. Andante
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Bach, JS: Flute Sonata in B Minor, BWV 1030: II. Largo e dolce
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Bach, JS: Flute Sonata in B Minor, BWV 1030: III. Presto
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Françaix: Wind Quintet No. 1: I. Andante tranquillo - Allegro assai
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Françaix: Wind Quintet No. 1: II. Presto
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Françaix: Wind Quintet No. 1: III. Andante
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Françaix: Wind Quintet No. 1: IV. Tempo di marcia francese
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Mozart: Flute Concerto No. 1 in G Major, K. 313: I. Allegro maestoso (Cadenza by Rampal)
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Mozart: Flute Concerto No. 1 in G Major, K. 313: II. Adagio ma non troppo (Cadenza by Rampal)
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Mozart: Flute Concerto No. 1 in G Major, K. 313: III. Rondo. Tempo di menuetto (Cadenza by Rampal)
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Telemann: Tafelmusik, Pt. 1: Quartet for Flute, Oboe, Violin and Continuo in G Major, TWV 43:G2: I. Largo - Allegro
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Telemann: Tafelmusik, Pt. 1: Quartet for Flute, Oboe, Violin and Continuo in G Major, TWV 43:G2: II. Vivace
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Telemann: Tafelmusik, Pt. 1: Quartet for Flute, Oboe, Violin and Continuo in G Major, TWV 43:G2: III. Grave - Vivace
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Bach, JS: Meine Seufzer, meine Tränen, BWV 13: No. 5, Aria. "Ächzen und erbärmlich Weinen"
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Haydn: Flute Quartet in D Major, Hob. II:D11: I. Presto
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Haydn: Flute Quartet in D Major, Hob. II:D11: II. Menuetto - Trio
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Haydn: Flute Quartet in D Major, Hob. II:D11: III. Adagio
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Haydn: Flute Quartet in D Major, Hob. II:D11: IV. Presto assai
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Mozart: Concerto for Flute and Harp in C Major, K. 299: III. Rondeau. Allegro (Cadenza by Flothuis)
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Gluck: Orfeo ed Euridice, Wq. 30: Dance of the Blessed Spirits
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Mercadante: Flute Concerto No. 2 in E Minor, Op. 57: I. Allegro maestoso
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Mercadante: Flute Concerto No. 2 in E Minor, Op. 57: II. Largo
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Mercadante: Flute Concerto No. 2 in E Minor, Op. 57: III. Rondo russo
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Arma: Suite paysanne hongroise, Op. 153: I. Chants populaires tristes (After Bartók's Peasant Songs, Sz. 71)
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Arma: Suite paysanne hongroise, Op. 153: II. Scherzo (After Bartók's Peasant Songs, Sz. 71)
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Arma: Suite paysanne hongroise, Op. 153: III. Vieilles danses (After Bartók's Peasant Songs, Sz. 71)
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Bach, CPE: Flute Concerto in B-Flat Major, Wq. 167: I. Allegretto
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Bach, CPE: Flute Concerto in B-Flat Major, Wq. 167: II. Adagio
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Bach, CPE: Flute Concerto in B-Flat Major, Wq. 167: III. Allegro assai
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Ibert: Flute Concerto: III. Allegro scherzando
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Jolivet: 5 Incantations: No. 2, Pour que l'enfant qui va naître soit un fils
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Tartini: Flute Concerto in D Major: I. Allegro (Transcr. Rampal of Violin Concerto, D. 50)
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Tartini: Flute Concerto in D Major: II. Grave (Transcr. Rampal of Violin Concerto, D. 50)
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Tartini: Flute Concerto in D Major: III. Allegro (Transcr. Rampal of Violin Concerto, D. 50)
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Francois Devienne: 9 Sonates Pour Flûte et Clavecin (Remastered)
Devienne: 6 Trios for Flute, Viola & Cello
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Flute Concerto No. 7 in E Minor: I. Allegro
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Clarinet Sonata No. 1 in C Major: I. Allegro con spiritoso
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Clarinet Sonata No. 1 in C Major: II. Adagio
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Clarinet Sonata No. 2 in E-Flat Major: I. Allegro con spiritoso
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Clarinet Sonata No. 2 in E-Flat Major: II. Adagio
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Clarinet Sonata in B-Flat Major: II. Largo
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Clarinet Sonata in E-Flat Major: II. Adagio cantabile
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Devienne: Sonatas for Flute, Sonatas for Bassoon
Devienne, F.: Quartets, Op. 73, Nos. 1-3
Devienne: Six sonates pour le basson avec accompagnement de basse
Devienne, F.: Flute Concertos Nos. 9 and 12 / Flute Concerto in G Major, Op. Posth.
François Devienne: Three Quartets for Bassoon, Violin, Viola and Bass, Op. 73
François Devienne, Six sonatas for bassoon & fortepiano Op. 24
Saint-Saëns: Clarinet Sonata in E-Flat Major, Op. 167: I. Allegretto
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Saint-Saëns: Clarinet Sonata in E-Flat Major, Op. 167: II. Allegro animato
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Saint-Saëns: Clarinet Sonata in E-Flat Major, Op. 167: III. Lento
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Saint-Saëns: Clarinet Sonata in E-Flat Major, Op. 167: IV. Molto allegro
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Poulenc: Clarinet Sonata, FP 184: I. Allegro tristamente
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Poulenc: Clarinet Sonata, FP 184: II. Romanza
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Poulenc: Clarinet Sonata, FP 184: III. Allegro con fuoco
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