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  track: Symphony No. 38 in D Major, K. 504 "Prague": III. Presto
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  track: Andante for Flute and Orchestra in C Major, K. 315
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Clarinet Quintet in A Major, K. 581: II. Larghetto
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  date published: 2026-07-31T21:25:57Z
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  value: 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

Octet In E Flat, Op. 20, MWV R20: 1. Allegro moderato, ma con fuoco
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Octet In E Flat, Op. 20, MWV R20: 2. Andante
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Octet In E Flat, Op. 20, MWV R20: 3. Scherzo (Allegro leggierissimo)
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Octet In E Flat, Op. 20, MWV R20: 4. Presto
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Symphony No. 41 in C Major, K. 551 "Jupiter": IV. Molto allegro
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  date published: 2026-07-08T03:20:19Z
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Piano Concerto No. 9 in E-Flat Major, K. 271 "Jeunehomme": III. Rondeau. Presto
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
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Piano Concerto No. 17 in G Major, K. 453: III. Allegretto - Presto
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Piano Concerto No. 17 in G Major, K. 453: III. Allegretto - Presto
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Clarinet Concerto in A Major, K. 622: II. Adagio
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  date published: 2026-07-08T03:20:19Z
audio: Clarinet Concerto in A Major, K. 622: II. Adagio
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Concerto in C Major for Flute and Harp, K. 299: I. Allegro
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audio: Concerto in C Major for Flute and Harp, K. 299: I. Allegro
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Andante for Flute and Orchestra in C Major, K. 315
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: Andante for Flute and Orchestra in C Major, K. 315
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Adagio in E Major, K. 261
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: Adagio in E Major, K. 261
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Violin Concerto No. 5 in A Major, K. 219: I. Allegro aperto
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:39:04Z
audio: Violin Concerto No. 5 in A Major, K. 219: I. Allegro aperto
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Divertimento in D Major, K. 136: I. Allegro
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: Divertimento in D Major, K. 136: I. Allegro
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Serenade in E-Flat Major, K. 375: V. Allegro
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Serenade in E-Flat Major, K. 375: V. Allegro
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Piano Sonata No. 16 in C Major, K. 545: I. Allegro
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: Piano Sonata No. 16 in C Major, K. 545: I. Allegro
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Requiem in D Minor, K. 626: VIII. Lacrimosa
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subject of: OpenTimestamps Proof of Existence
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100 Best of Mozart
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Schöenberg & Strauss: Music for Strings
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Brahms: Most Beautiful Adagios
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Best of Mozart
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A Day with Beethoven
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Peaceful Clarinet: The Romantic Collection
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Galop in Classical Music
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Schubert in Love, Vol. 1
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Best of Chamber Music
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Meditations for All Seasons: Music for Spring, Summer, Autumn and Winter
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Mendelssohn: Octet; Beethoven: Septet
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Mozart and the Horn
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Schubert: String Quartet No. 15 in G Major, Op. 161, D. 887
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Basic Mendelssohn
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Mozart: Chamber Music
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Best of Mendelssohn
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