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 0xaf3abff0e81f7d18082ab186174a77e63cdfb76355e5a587d8b2cc839a274ca4. 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/ed6d3e79-d179-4435-a5a0-290ff45dd16d.json and https://artists.proofprofile.net/proofs/artist/ed6d3e79-d179-4435-a5a0-290ff45dd16d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
101 Classics - The Best Loved Classical Melodies
An der schonen, blauen Donau (The Beautiful Blue Danube), Op. 314
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 0x99f9192770574915c7491472dc2c7fd5524f6dafed5677d6c674d89993509b4a. 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/HKI199245311.
Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso (Opening)
Polish National Radio Symphony Orchestra
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Emperor Waltz, Op. 437: Kaiser Walzer (Emperor Waltz), Op. 437
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The Danube Waves: Valurile Dunarii (The Danube Waves)
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Bagatelle in A Minor, WoO 59, "Fur Elise"
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Serenade for Strings in C Major, Op. 48: II. Walzer
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Les Patineurs, Op. 183, "The Skater's Waltz"
Slovak State Philharmonic Orchestra, Kosice
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The Nutcracker Suite, Op. 71a: VIII. Waltz of the Flowers
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Piano Sonata No. 11 in A Major, K. 331: III. Alla Turca: Allegretto
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Gnossienne No. 4: About Schmidt - Gnossiene No. 4
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Concerto for Two Violins and Strings in D Minor, BWV 1043: II. Largo ma non tanto
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Ella Kiang Sings Popular Chinese Folk Songs
Hummel: Piano Sonatas, Vol. 3 - Nos. 1, 7, 8, 9
Hummel: Piano Sonatas, Vol. 2 - Nos. 4, 6
Hummel: Piano Sonatas, Vol. 1 - Nos. 2, 3, 5
Piano Sonata No. 3 in F Minor, Op. 20: I. Allegro moderato - Adagio - Allegro agitato
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Piano Sonata No. 5 in F-Sharp Minor, Op. 81: III. Finale: Vivace
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Mozart: Piano Concertos Nos. 20 and 21 / Haydn: Piano Concerto No. 11
Haydn, F.J.: Piano Concertos - Hob.XVIII:F1, 4, 9, 11
Ibert: Petite Suite / Histoires / Les Rencontres
Petite suite en 15 images: X. Serenade sur l'eau
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Bach, J.S.: Piano Concertos, Vol. 2 (Bwv 1055-1058)
Keyboard Concerto in F Major, BWV 1057: II. Andante
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Bach, J.S.: Piano Concertos, Vol. 1 (Bwv 1052-1054)
Petite suite en 15 images: Berceuse aux etoiles
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Piano Favourites for Young People, Vol. 3
Piano Sonata No. 16 in C Major, K. 545 "Sonata facile": I. Allegro
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Twinkle, Twinkle Little Star Variations (Version for Piano): Variation A
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Twinkle, Twinkle Little Star Variations (Version for Piano): Variation B
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Twinkle, Twinkle Little Star Variations (Version for Piano): Variation C
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Twinkle, Twinkle Little Star Variations (Version for Piano): Variation D
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5 Lieder und ein Kanon, Op. 13: Wiegenlied, Op. 13, No. 2, J. 96 (arr. for piano)
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Concerto for 2 violins in D Minor, BWV 1043: Largo ma non troppo
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Keyboard Concerto, BWV 974 (arr. for guitar): Harpsichord Concerto, BWV 974: Adagio
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Overture (Suite) No. 3 in D Major, BWV 1068: Suite No. 3 in D Major, BWV 1068: Air, "Air on a G String"
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St. Matthew Passion, BWV 244: Erbarme dich' mein Gott
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Herz und Mund und Tat und Leben, BWV 147: Jesu, Joy of Man's Desiring (arr. for organ)
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The Well-Tempered Clavier, Book 1: Prelude No. 1 in C Major, BWV 846
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Brandenburg Concerto No. 2 in F Major, BWV 1047: II. Andante
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Was mir behagt, ist nur die muntre Jagd, BWV 208, "Hunt Cantata": Schafe konnen sicher weiden (arr. for organ)
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Overture (Suite) No. 2 in B Minor, BWV 1067: III. Sarabande
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Keyboard Concerto in E Major, BWV 1053: Piano Concerto in E Major, BWV 1053: Siciliano
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Sonata No. 3 for Violin and Harpsichord in E Major, BWV 1016: III. Adagio ma non troppo
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Cello Suite No. 1 in G Major, BWV 1007: Prelude
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Klassiska Favoriter (Classical Favourites)
Solomon, HWV 67: Arrival of the Queen of Sheba
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Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
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Overture (Suite) No. 3 in D Major, BWV 1068: Suite In D Major, No. 3: Air
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Violinromanze Nr. 2 F-Dur, Op. 50: Romance No. 2 in F Major, Op. 50
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Peer Gynt: In the Hall of the Mountain King
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Overture (Suite) No. 2 in B Minor, BWV 1067: Suite No. 2 in B Minor, "Badinerie"
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27, No. 2, "Moonlight": I. Adagio sostenuto
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The 4 Seasons: Violin Concerto in E Major, Op. 8, No. 1, RV 269, "La primavera" (Spring): The Four Seasons: Violin Concerto, Op. 8, No. 1, RV 269, "Spring": I. Allegro
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Concerto in C Major, RV 443: Flautino Concerto No. 11 in C Major, RV 443: Largo
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Symphony No. 40 in G Minor, K. 550: Molto allegro
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3 Gymnopedies (arr. A. Miolin): Gymnopedie No. 1
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Music for the Royal Fireworks, HWV 351: Fireworks Music - La rejouissance
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Violin Concerto No. 3 in G Major, K. 216: Adagio
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The Sleeping Beauty, Op. 66: Sleeping Beauty Waltz
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Requiem in D Minor, K. 626: Sequence: VI. Lacrimosa dies illa
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Romeo and Juliet: Montagues and Capulets
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4 Impromptus, Op. 142, D. 935: Impromptu No. 6 in A-Flat Major, Op. 142/2, D. 935, No. 2
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12 Melodies, Op. 33: 12 Songs, Op. 33: No. 2. Varen (Last Spring)
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Orfeo ed Euridice: Dance of the Blessed Spirits
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Klarinettenkonzert A-Dur, K. 622: 2. Adagio (Jenseits von Afrika): Concerto for Clarinet and Orchestra in A Major, K. 622: Adagio
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5 Military Marches, Op. 39, "Pomp and Circumstance": Pomp and Circumstance Marches, No. 1: Allegro con molto
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Water Music: Suite No. 2 in D Major, HWV 349: II. Alla Hornpipe
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Sinfonie Nr. 9 d-Moll, Op. 125: 4. Finale: Presto - Allegro assai (Uhrwerk Orange): Symphony No. 9 in D Minor, Op. 125, "Choral": IV. Finale: Presto - Allegro assai (excerpt)
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Oboe Concerto No. 2 in D Minor, Op. 9: Adagio
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Keyboard Concerto in F Minor, BWV 1056: Piano Concerto No. 5 in F Minor, BWV 1056: Largo
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Trumpet Concerto in E-Flat Major, Hob.VIIe:1: III. Finale: Allegro
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Klavierkonzert Nr. 21 C-Dur, K. 467, "Elvira Madigan": 2. Andante (Elvira Madigan): Piano Concerto No. 21 in C Major, K. 467, "Elvira Madigan": II. Andante
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The Four Seasons: Violin Concerto in E Major, Op. 8, No. 1, RV 269, "Spring": I. Allegro
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Konzert für Oboe d-Moll: Oboe Concerto in D Minor: II. Adagio
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Suite für Orchester Nr. 3 D-Dur, BWV 1068: Overture (Suite) No. 3 in D Major, BWV 1068: II. Air, "Air on a G String"
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Concerto in the Italian Style, BWV 971, "Italian Concerto": I. Allegro
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Music for the Royal Fireworks, HWV 351: III. La paix
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Keyboard Sonata in F Minor, K.467/L.476/P.513
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Keyboard Suite No. 7 (Set I) in G Minor, HWV 432: IV. Sarabande
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French Suite No. 5 in G Major, BWV 816: VII. Gigue
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Trio Sonata in B-Flat Major, Op. 5, No. 17, RV 76: I. Preludio: Andante
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Trio Sonata in B-Flat Major, Op. 5, No. 17, RV 76: II. Allemanda: Allegro
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Trio Sonata in B-Flat Major, Op. 5, No. 17, RV 76: III. Corrente: Allegro
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Water Piece in D Major, HWV 341 (arr. for trumpet and orchestra): I. Overture
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Water Piece in D Major, HWV 341 (arr. for trumpet and orchestra): II. Allegro (Gigue)
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Water Piece in D Major, HWV 341 (arr. for trumpet and orchestra): III. Air (Minuet)
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Water Piece in D Major, HWV 341 (arr. for trumpet and orchestra): IV. March (Bourree)
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Water Piece in D Major, HWV 341 (arr. for trumpet and orchestra): V. March
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Violin Partita No. 3 in E Major, BWV 1006: I. Preludio
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Trumpet Sonata in D Major, Z. 850: I. Allegro
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Trumpet Sonata in D Major, Z. 850: II. Adagio
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Trumpet Sonata in D Major, Z. 850: III. Allegro
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Sonata a 5 in G Minor, Op. 2, No. 6: I. Adagio
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Sonata a 5 in G Minor, Op. 2, No. 6: II. Allegro
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Sonata a 5 in G Minor, Op. 2, No. 6: III. Grave
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Sonata a 5 in G Minor, Op. 2, No. 6: IV. Allegro
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Suite für Orchester Nr. 2 h-Moll, BWV 1067: Overture (Suite) No. 2 in B Minor, BWV 1067: VII. Badinerie
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Serses, HWV 40: Serse (Xerxes), HWV 40, Act I: Ombra mai fu, "Largo" (arr. for oboe and orchestra)
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Konzert für Oboe Nr. 3 g-Moll, HWV 287: Oboe Concerto No. 3 in G Minor, HWV 287: III. Sarabande
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Solomon, HWV 67, Act III: Sinfonia, "Arrival of the Queen of Sheba"
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Violin Concerto in A Minor, Op. 3, No. 6, RV 356: II. Largo
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The Four Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter": The 4 Seasons: Violin Concerto in F Minor, Op. 8, No. 4, RV 297, "L'inverno" (Winter): II. Largo
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Recorder Concerto in C Major, RV 443 (Version for Piccolo & Orchestra): Concerto in C Major, RV 443: II. Largo
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Herz und Mund und Tat und Leben, BWV 147: Chorale: Jesus bleibt meine Freude (arr. for organ)
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Keyboard Concerto in F Minor, BWV 1056: II. Largo
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Canon & Gigue in D Major, P. 37: Canon and Gigue in D Major
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Konzert für Trompete D-Dur, TWV 51:D7: Trumpet Concerto in D Major, TWV 51:D7: I. Adagio
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Flute Concerto in D Major, Op. 10, No. 3, RV 428, "Il gardellino": II. Cantabile
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Wassermusik-Suite Nr. 1 F-Dur, HWV 348: Water Music: Suite No. 1 in F Major, HWV 348: VI. Air
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Concerto for Lute and 2 Violins in D Major, RV 93 (arr. for lute and strings): I. Allegro giusto
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Concerto for Lute and 2 Violins in D Major, RV 93 (arr. for lute and strings): II. Largo
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Concerto for Lute and 2 Violins in D Major, RV 93 (arr. for lute and strings): III. Allegro
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Konzert für Violine g-Moll, Op. 12 Nr. 1, RV 317: I. Allegro
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Konzert für Violine g-Moll, Op. 12 Nr. 1, RV 317: II. Largo - Adagio
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Konzert für Violine g-Moll, Op. 12 Nr. 1, RV 317: III. Allegro
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Der Messias, HWV 56: Messiah, HWV 56, Part II: Hallelujah! (Chorus)
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Violin Concerto in A Minor, BWV 1041: III. Allegro assai
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Christmas Oratorio, BWV 248, Part II: Sinfonia
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Herz und Mund und Tat und Leben, BWV 147: Chorale: Jesus bleibet meine Freude (Jesu, Joy of Man's Desiring) (arr. for piano)
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Brandenburg Concerto No. 3 in G Major, BWV 1048: III. Allegro
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Concerto for Oboe and Violin in C Minor, BWV 1060: II. Adagio
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Overture (Suite) No. 3 in D Major, BWV 1068: II. Air, "Air on a G String"
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18 Chorales, BWV 651-668, "Leipziger Chorale": Nun komm, der Heiden Heiland, BWV 659
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Keyboard Concerto in F Minor, BWV 1056: Concerto in F Minor, BWV 1056: II. Largo
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Overture (Suite) No. 2 in B Minor, BWV 1067: VII. Badinerie
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Violin Concerto E Major, BWV 1042: II. Adagio
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Brandenburg Concerto No. 2 in F Major, BWV 1047: III. Allegro assai
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Wachet auf, ruft uns die Stimme, BWV 140: Wachet auf, ruft uns die Stimme (arr: for orchestra)
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Concerto in D Minor (after the Oboe Concerto by A. Marcello), BWV 974: Adagio (arr. E. Voorhorst)
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Concerto in the Italian Style in F Major, BWV 971, "Italian Concerto": Italian Concerto in F Major, BWV 971: II. Andante
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Das Orgelbuchlein, BWV 599-644: The Little Organ Book: Ich ruf zu dir, BWV 639
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Keyboard Concerto in E Major, BWV 1053: Harpsichord Concerto in E Major, BWV 1053: II. Siciliano
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Oratorium Festo Paschali: Kommt, eilet und laufet (Easter Oratorio), BWV 249: Kommt, eilet und laufet, BWV 249, "Easter Oratorio": I. Sinfonia, ''Adagio''
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Keyboard Concerto in F Minor, BWV 1056: Harpsichord Concerto in F Minor, BWV 1056: Largo
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Concerto for 2 violins in D Minor, BWV 1043: Largo ma non tanto
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Flute Sonata in E-Flat Major, BWV 1031: II. Siciliano
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Violin Sonata No. 3 in C Major, BWV 1005: Largo (arr. N. Goluses)
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The Well-Tempered Clavier Book I: 24 Preludes and Fugues: No. 1 in C Major, BWV 846: Prelude
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Clavierbuchlein for Anna Magdalena Bach, Book 2, BWV Anh. 113-132: Minuet in G Major, Anh 114
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Partita in A Minor, BWV 1013 (arr. E. Voorhorst for guitar): Bourree anglaise
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Serse (Xerxes), HWV 40 (arr. for oboe and orchestra): Serse: Largo
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Concerto Grosso in D Major, Op. 6, No. 1: Largo
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Keyboard Concerto in F Minor, BWV 1056: Piano Concerto in F Minor, BWV 1056: Largo
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Concerto Grosso in A Minor, Op. 6, No. 4: Largo, e piano
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Oboe Concerto in B-Flat Major: Largo e mesto
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Concerto Grosso in C Minor, Op. 6, No. 3: Largo
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Concerto for 2 Violins in D Minor, BWV 1043: Double Concerto in D Minor, BWV 1043: Largo ma non tanto
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Violin Concerto in C Major, Op. 8, No. 6: Largo (e cantabile)
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Concerto Grosso in D Major, Op. 6, No. 5: Largo
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Musique de table, Part II: Concerto for 3 Violins in F Major, TWV 53:F1: Concerto for 3 Violins in F Major: Largo
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Concerto Grosso in F Major, Op. 6, No. 6: Largo
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Concerto in C Major, RV 443: Flautino Concerto in C Major, RV 443: Largo
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Concerto Grosso in B Minor, Op. 6, No. 12: Largo
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Chamber Concerto in D Major, RV 93 (arr. for guitar and orchestra): Guitar Concerto in D Major, RV 93: Largo
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Oboe Concerto No. 3 in G Minor, HWV 287: Sarabande (Largo)
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Violin Concerto in A Minor, Op. 3, No. 6: Largo
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Concerto Grosso in C Major, HWV 318, "Alexander's Feast": Alexander's Feast: Largo
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Concerto for Oboe and Violin in B-Flat Major, RV 548: Largo
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The 4 Seasons: Violin Concerto in F Minor, Op. 8, No. 4, RV 297, "L'inverno" (Winter): Violin Concerto Op. 8, No. 4, ' Winter': Largo
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Overture (Suite)No. 3 In D Major, BWV 1068: II. Air, "Air On A G String"
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Violin Concerto In A Minor, BWV 1041: II. Andante
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Keyboard Concerto In E Major, BWV 1053: II. Siciliano
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Christmas Oratorio (Weihnachtsoratorium), BWV 248, Part II: Sinfonia
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Clavierbuchlein For Anna Magdalena Bach, Book 2, BWV Anh. 113-132: Anna Magdalena Notenbuch (Clavier-buchlein III): Menuet In G Major, BWV Anh 114
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Brandenberg Concerto No. 1 In F Major, BWV 1046: II. Adagio
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Adagio in G Minor: Adagio in G Minor (attrib. To Albinoni) [Attrib. T. Albinoni]
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Suite No. 3 in D Major, BWV 1068: II. Air, "On the G String"
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Air from Suite No. 3 in D Major, BWV 1068
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Adagio from Cello Concerto in C Minor, RV 434
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Largo from Concerto for keyboard, strings and basso continuo in F Minor, BWV 1056
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Adagio-Allegro-Adagio from Concerto Grosso in G Minor Op. 6, No. 8 - Christmas Concerto
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Adagio from Clarinet Concerto in A Major, KV 622
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Lento assai, cantante e tranquillo from String Quartet No. 16 in F Major Op. 135
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Brandenburg Concerto No. 1 in F Major, BWV 1046: Adagio
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Das Orgelbuchlein, BWV 599-644: The Little Organ Book: Ich ruf zu dir, Herr Jesu Christ, BWV 639
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Concerto in C Minor for Violin and Oboe, BWV 1060: Adagio
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Piano Concertino in G Major, Op. 73: II. Andante Grazioso
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Symphony No. 5 in C-Sharp Minor: IV. Adagietto
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Keyboard Concerto in F Minor, BWV 1056: Largo
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A Guided Tour of the Baroque Era, Vol. 7
Messiah, HWV 56 (1751 Version): Part I: Sinfonia
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Zadok the Priest, HWV 258: And all the people rejoiced
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5 Lieder, Op. 49: No. 4, Wiegenlied (Arr. P. Nagy for Piano)
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Piano Sonata No. 3 in F Minor, Op. 5: I. Allegro maestoso
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Piano Sonata No. 11 in A Major, K. 331: III. Rondo alla turca: Allegretto
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Sonata concertata in A Major, Op. 61, MS 2: II. Adagio, assai espressivo
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Violin Sonata in G Minor, "The Devil's Trill"
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Piano Sonata No. 10 in C Major, K. 330: I. Allegro moderato
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Keyboard Concerto in F Minor, BWV 1056: Harpsichord Concerto in F Minor, BWV 1056: II. Larghetto (Lara Croft: Tomb Raider)
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Herz und Mund und Tat und Leben, BWV 147: Chorale. Jesus bleibet meine Freude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566ae1b5bc095cedaa144a7807fcfe0614423f7dc24816da7571a4678301a6c8. 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/HKI199207618.
Cello Suite No. 1 in G Major, BWV 1007: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74d69aa25b7dfef36059cb37cba6eed97e66028d717ed6fef111ad2360517bb. 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/HKI190446501.
Orchestral Suite No. 2 in B Minor, BWV 1067: VII. Badinerie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a15593629171d65dfe5fc9b7a3bb5bb39cd35f703e185f084dc2f5724fe4e1. 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/HKI199206114.
Magnificat in D Major, BWV 243: I. Magnificat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc03ef744b694b6bc84b93e72c89e5b56c0cf26968a5b99fc05f6bc3ced4ddd. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/HKI191822801.