250px|thumb|Interior of the Old Residenztheater, now Cuvilliés Theatre, which opened with Ferrandini's opera Catone in Utica in 1753 Giovanni Battista Ferrandini (c. 1710 – 25 October 1791), an Itali
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 0xc0716e8c9cfdb571ab03e627f8c6522d82d10361389a33f5736b18fa33547b2e. Chain 2 (Bitcoin): anchored in block 954010 (2026-06-16T21:41:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34192e98-259c-43b0-897d-a4e071aa483c.json and https://artists.proofprofile.net/proofs/artist/34192e98-259c-43b0-897d-a4e071aa483c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vivaldi, Tartini, Albinoni, Ferrandini, Giordani, Galuppi: Italian Flute Concertos
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 0xf13578ad7ab5d811ebf872164c880d23ae4347489f3aade0787656b2b878d57f. 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/NLB159700546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762c023c23678aa82abcfde3e1a8553f67898ae75022d795f83c9df6f0e6ebb1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLB159700547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca5888c882159935435defc17ab8de10f4dd70d19fe481a9edf03404ec8f76f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLB159700548.
Handel & Purcell: Arias & Cantatas (Live)
Bernasconi: L'Olimpiade, Act 2: "Siam navi all’onde algenti" (Aminta)
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Gluck: Il re pastore, Act 3: "Sol può dir come si trova" (Agenore)
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Piccinni: Catone in Utica, Act 1: "Che giurai? Che promisi?" (Arbace)
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Piccinni: Catone in Utica, Act 1: "Che legge spietata" (Arbace)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142e42ce5dd103a6e547e5f5e9c7711a7d52e7f760ea9df1fc8f3dee195cddae. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBAYC2300963.
Ferrandini: 24 Arias: No. 23, Gelido in ogni vena (From Sächsische Landsbibliothek MS 3037-I-6)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737ca0a3c77aecd31a62ae3f9aa8fa2f320f587ca073821fea9d4ac864768df5. 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/GBAYC2300964.
Traetta: L'Olimpiade, Act 2: "Dove son? Che m’avenne?" (Licida)
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Traetta: L'Olimpiade, Act 2: "Gemo in un punto e fremo" (Licida)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c0cacdc7121ec30f90a634c82e6d53b09b4010a7150e04641109e5e4894a8c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBAYC2300966.
Valentini: La clemenza di Tito, Act 2: "Se mai senti spirarti sul volto" (Sesto)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eff55721aed480e08886207bd61ee9aca0d12c0f0755416ceef85335cfa1f70. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBAYC2300968.
Hasse: Demofoonte, Sinfonia: II. Andantino
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Hasse: Demofoonte, Sinfonia: III. Presto
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Hasse: Demofoonte, Act 1: "Ma che vi fece, o stelle" (Timante)
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Hasse: Demofoonte, Act 1: "Sperai vicino il lido" (Timante)
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Hasse: Demofoonte, Act 3: "Misero pargoletto" (Timante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9bf7071aebf823525f65263a77d91d0337c72737ff1e72e0dae5180ee48335. 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/GBAYC2300971.
Bach, JC: Artaserse, Act 2: "Per quel paterno amplesso" (Arbace)
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Jommelli: Artaserse, Act 1: "Fra cento affanni" (Arbace)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90adacf3dd46674d22538bf995166e3241395bb68d034f1bd312528232c9ff05. 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/GBAYC2300973.
Les Contes d'Hoffmann / Act 4: Entr'acte (Barcarolle)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dba7e553ad55f44d3ee01c5352a5f68397b17cc4fa67af5cb7c980892a06c3c. 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/DEF059604760.
La Cenerentola / Act 2: "Nacqui all'affanno e al pianto" - Live at Alte Oper, Frankfurt / 1986
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cf8e204028399842009b00f5ebd1f27ca8803d58909c5da3a17f0006122bf4. 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/DEF059604750.
One Touch Of Venus: I'm A Stranger Here Myself
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St. Matthew Passion, BWV 244, Pt. 2: No. 39, Aria. Erbarme dich (Alto)
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Il pianto di Maria (Prev. Attrib. Handel as HWV 234): II. Cavatina. Se d'un Dio fui fatta madre
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ec7937f617fbe4f7991a6571a3773702820240c2120f4f79803fb39f87c884. 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/DEF059304050.
Paride ed Elena, Wq. 39, Act I: O del mio dolce ardor
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Messiah, HWV 56 / Pt. 3: L. "If God Be for Us"
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Ariodante HWV 33 / Act 2: "Scherza infida in grembo al drudo" - Excerpt
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Donna, che in ciel di tanta luce splendi HWV 233: Aria con coro: "Maria, salute e speme"
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3248f18bfa9e295d27daae5457560f8b0cd7f0a5f4bffdf80b58fdcafc456a77. 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/DEF059302921.
Messiah / Part 1: 18a. "He shall feed his flock"
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Handel: Dixit Dominus - Ferrandini: Il pianto di Maria
Dixit Dominus, HWV 232: No. 1, Chorus, "Dixit Dominus, Domino meo" (Chorus, Soprano 1, Soprano 2, Alto, Tenor)
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Dixit Dominus, HWV 232: No. 6, Chorus, "Dominus a dextris tuis" (Chorus, Soprano 1, Soprano 2, Alto, Tenor, Bass)
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Il pianto di Maria: No. 2, Cavatina, "Se d’un Dio fui fatta Madre" (Soprano)
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Il pianto di Maria: No. 6. Aria, "Sventurati miei sospiri" (Soprano)
Anne-Sofie von Otter - The Artist's Album
La Cenerentola / Act 2: "Nacqui all'affanno e al pianto"
Ferrandini, G.B.: Catone in Utica [Opera]
Giovanni Domenico Ferrandini: Cantate drammatiche
Ferrandini, G.B.: Flute Concerto in F Major / O Spettaculo Pur Troppi Funesto / Quartet in G Minor / Ecco Del Tronco
Sonata a 4 for Strings and Continuo in E flat, R.130: 1. Largo molto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e08ba4ec67f5d8b556de52062f19f143a42d06528f0e28607478f7ba2c5f213. 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/GBBBA0801422.
Cavatina da capo: Se d'un Dio fui fatta Madre
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Sonata in C minor for strings & continuo: 2. Allegro
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Handel: Flute Concerto, Concerto for 2 Violins and Cello in B-Flat Major & Giunta l'ora fatal
Venice and Beyond: Concerti da Camera & Sonate Concertate for Woodwind Instruments
Anniversary Series, Vol. 14: The Most Beautiful Concert Highlights from Maulbronn Monastery, 2014-2017 (Live)
Trio Sonata in G Major, Op. 5 No. 4, HWV 399: I. Allegro
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Trio Sonata in G Major, Op. 5 No. 4, HWV 399: II. A tempo ordinario – Allegro non presto – Adagio
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Trio Sonata in G Major, Op. 5 No. 4, HWV 399: III. Passacaille
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Trio Sonata in G Major, Op. 5 No. 4, HWV 399: IV. Gigue. Presto
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Trio Sonata in G Major, Op. 5 No. 4, HWV 399: V. Menuet. Allegro moderato
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Concerto for Recorder and 2 Violins in A Minor, RV 108: I. Allegro
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Concerto for Recorder and 2 Violins in A Minor, RV 108: II. Largo
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Concerto for Recorder and 2 Violins in A Minor, RV 108: III. Allegro
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Trio Sonata for Flute and Violin in D Major, RV 84: I. Allegro
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Trio Sonata for Flute and Violin in D Major, RV 84: II. Andante
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Trio Sonata for Flute and Violin in D Major, RV 84: III. Allegro
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Concerto for Flute and 2 Violins in G Major, RV 102: I. Allegro
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Concerto for Flute and 2 Violins in G Major, RV 102: II. Adagio
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Concerto for Flute and 2 Violins in G Major, RV 102: III. Vivace
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Concerto for Flute and 2 Violins in G Major, RV 102: IV. Arietta
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Concerto for Flute and 2 Violins in G Major, RV 102: V. Minuetto
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Concerto for Flute and 2 Violins in D Major, RV 89: I. Allegro assai
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Concerto for Flute and 2 Violins in D Major, RV 89: II. Cantabile – Andante e poco vivace
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Concerto for Flute and 2 Violins in D Major, RV 89: III. Allegro
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Brandenburg Concerto No. 6 In B-Flat Major, BWV 1051: 1. —
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Brandenburg Concerto No. 6 In B-Flat Major, BWV 1051: 2. Adagio ma non tanto
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Brandenburg Concerto No. 6 In B-Flat Major, BWV 1051: 3. Allegro
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Brandenburg Concerto No. 4 In G Major, BWV 1049: 1. Allegro
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Brandenburg Concerto No. 4 In G Major, BWV 1049: 2. Andante
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Brandenburg Concerto No. 4 In G Major, BWV 1049: 3. Presto
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Brandenburg Concerto No. 2 in F Major, BWV 1047: I. (Allegro)
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Brandenburg Concerto No. 2 in F Major, BWV 1047: II. Andante
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Brandenburg Concerto No. 1 in F Major, BWV 1046: I. (Allegro)
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Brandenburg Concerto No. 1 in F Major, BWV 1046: II. Adagio
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Brandenburg Concerto No. 1 in F Major, BWV 1046: III. Allegro
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Brandenburg Concerto No. 1 in F Major, BWV 1046: IV. Menuet - V. Trio - VI. Polonaise - VII. Trio
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Musical Offering, BWV 1079: 1. Ricercar a 3
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Musical Offering, BWV 1079: 4a. Canon 1 a 2 cancrizans
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Musical Offering, BWV 1079: 4b. Canon 2 a 2 violini in unisono
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Musical Offering, BWV 1079: 4c. Canon 3 a 2 per motum contrarium
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Musical Offering, BWV 1079: 4d. Canon 4 a 2 per augmentationem, contrario motu
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Musical Offering, BWV 1079: 4e. Canon 5 a 2 per tonos
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Musical Offering, BWV 1079: 4f. Fuga canonica in Epidiapente
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Musical Offering, BWV 1079: 4g. Canon perpetuus super thema regium
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Musical Offering, BWV 1079: 4h. Canon perpetuus
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Musical Offering, BWV 1079: 4i. Canon a 2
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Musical Offering, BWV 1079: 4k. Canon a 4
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Musical Offering, BWV 1079: Sonata a 3 - I Largo
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Musical Offering, BWV 1079: Sonata a 3 - II Allegro
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Musical Offering, BWV 1079: Sonata a 3 - III Andante
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Musical Offering, BWV 1079: Sonata a 3 - IV Allegro
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Musical Offering, BWV 1079: 2. Ricercar a 6
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Geschwinde, ihr wirbelnden Winde, BWV 201: I. Chorus. Geschwinde, ihr wirbelnden Winde
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Geschwinde, ihr wirbelnden Winde, BWV 201: II. Recit. Und du bist doch so unverschämt und frei
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Ah! che troppo ineguali HWV 230: Recitativo: "Ah! che troppo ineguali"
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Ah! che troppo ineguali HWV 230: Aria / Adagio: "O del ciel Maria regina"
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Donna, che in ciel di tanta luce splendi HWV 233: Introduzione
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Donna, che in ciel di tanta luce splendi HWV 233: (Recitativo:) "Donna, che in ciel di tanta luce splendi"
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Donna, che in ciel di tanta luce splendi HWV 233: (Aria:) "Vacillò, per terror del primo errore"
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Donna, che in ciel di tanta luce splendi HWV 233: (Recitativo accompagnato:) "Torna immobile in grembo"
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Donna, che in ciel di tanta luce splendi HWV 233: (Aria) Adagio: "Tu sei la bella serena stella"
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Donna, che in ciel di tanta luce splendi HWV 233: (Recitativo:) "Pur nella via che resta"
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Donna, che in ciel di tanta luce splendi HWV 233: (Aria) Allegro: "Sorga pure dall'orrido averno"
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Donna, che in ciel di tanta luce splendi HWV 233: (Recitativo:) "Dunque a te diamo lodi"
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Il pianto di Maria (Prev. Attrib. Handel as HWV 234): I. Recit. Giunta l'ora fatal dal ciel prescritta
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Il pianto di Maria (Prev. Attrib. Handel as HWV 234): III. Accompagnato. Ah me infelice! – IV. Cavatina (Reprise)
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Il pianto di Maria (Prev. Attrib. Handel as HWV 234): V. Recit. Ahimè ch'egli già esclama ad alta voce
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Il pianto di Maria (Prev. Attrib. Handel as HWV 234): VI. Aria. Sventurati miei sospiri
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Il pianto di Maria (Prev. Attrib. Handel as HWV 234): VII. Accompagnato. Sì disse la gran Madre
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Il pianto di Maria (Prev. Attrib. Handel as HWV 234): VIII. Aria. Pari all'amor immenso
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Il pianto di Maria (Prev. Attrib. Handel as HWV 234): IX. Accompagnato. Or se per grande orror tremò la terra
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