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followers: 150
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additional property: OTSVerifyInstructions
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  value: 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
subject of: OpenTimestamps Proof of Existence
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album: 101 Classics - The Best Loved Classical Melodies
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  date published: 1998-12-01
  track: An der schonen, blauen Donau (The Beautiful Blue Danube), Op. 314
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
      type: PropertyValue
      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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T03:20:19Z
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  track: Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso (Opening)
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-07T16:07:00Z
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  track: Emperor Waltz, Op. 437: Kaiser Walzer (Emperor Waltz), Op. 437
  track: The Danube Waves: Valurile Dunarii (The Danube Waves)
  track: Serenade for Strings in C Major, Op. 48: II. Walzer
  track: Les Patineurs, Op. 183, "The Skater's Waltz"
  track: Sobre las olas (Over the Waves)
  track: The Nutcracker Suite, Op. 71a: VIII. Waltz of the Flowers
album: Adagio 2
album: Beyond Chopin
album: Baroque Music – 50 of the best
album: Coffee & Classical
album: Opera Without Words - The Most Famous Overtures, Preludes, and Interludes in Opera
album: Classics at the Movies: Comedy 1
track: Piano Concerto No. 1 in E Minor, Op. 11, B. 53: II. Romanza. Larghetto

Liveness
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Emperor Waltz, Op. 437: Kaiser Walzer (Emperor Waltz), Op. 437
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by artist: Johann Strauss II
by artist: Strauss Festival Orchestra
by artist: Ondrej Lenard
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: 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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by artist: Budapest Strauss Ensemble
by artist: Istvan Bogar
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: The Danube Waves: Valurile Dunarii (The Danube Waves)
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Serenade for Strings in C Major, Op. 48: II. Walzer
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additional property: OTSVerifyInstructions
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Serenade for Strings in C Major, Op. 48: II. Walzer
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Les Patineurs, Op. 183, "The Skater's Waltz"
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by artist: Slovak State Philharmonic Orchestra, Kosice
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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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
subject of: OpenTimestamps Proof of Existence
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Sobre las olas (Over the Waves)
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The Nutcracker Suite, Op. 71a: VIII. Waltz of the Flowers
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Adagio 2
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track: La Folia
track: Keyboard Suite No. 7 (Set I) in G Minor, HWV 432: IV. Sarabande
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Music for the Royal Fireworks, HWV 351: III. La paix
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La Folia
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Keyboard Suite No. 7 (Set I) in G Minor, HWV 432: IV. Sarabande
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duration: PT3M45S
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by artist: George Frideric Handel
by artist: Laurence Cummings
in album: Baroque Music – 50 of the best
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popularity: 5
genre: classical
genre: early-music
genre: baroque
genre: english-baroque
genre: german-baroque
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T20:41:57Z
audio: Keyboard Suite No. 7 (Set I) in G Minor, HWV 432: IV. Sarabande
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Trio Sonata in B-Flat Major, Op. 5, No. 17, RV 76: II. Allemanda: Allegro
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duration: PT3M12S
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explicit: false
by artist: Antonio Vivaldi
by artist: Danubius Ensemble
in album: Baroque Music – 50 of the best
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popularity: 4
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: 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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duration: PT2M42S
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by artist: Antonio Vivaldi
by artist: Danubius Ensemble
in album: Baroque Music – 50 of the best
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popularity: 3
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T16:07:00Z
audio: 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): II. Allegro (Gigue)
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duration: PT1M46S
duration ms: 106960
explicit: false
by artist: George Frideric Handel
by artist: Niklas Eklund
by artist: Drottningholm Baroque Ensemble
by artist: Nils-Erik Sparf
in album: Baroque Music – 50 of the best
  type: MusicAlbum
  date published: 2012-08-01
popularity: 4
genre: classical
genre: early-music
genre: baroque
genre: english-baroque
genre: german-baroque
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T14:04:01Z
audio: Water Piece in D Major, HWV 341 (arr. for trumpet and orchestra): II. Allegro (Gigue)
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Violin Partita No. 3 in E Major, BWV 1006: I. Preludio
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duration: PT3M42S
duration ms: 222426
explicit: false
by artist: Johann Sebastian Bach
by artist: Bin Huang
in album: Baroque Music – 50 of the best
  type: MusicAlbum
  date published: 2012-08-01
popularity: 5
genre: classical
genre: classical-piano
isrc code: HKI190290105
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T18:39:05Z
audio: 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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duration: PT1M20S
duration ms: 80493
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by artist: Henry Purcell
by artist: Ede Inhoff
by artist: Hungarian State Opera Chamber Orchestra
in album: Baroque Music – 50 of the best
  type: MusicAlbum
  date published: 2012-08-01
popularity: 7
genre: classical
genre: choral
isrc code: HKI199598109
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T06:56:49Z
audio: Trumpet Sonata in D Major, Z. 850: I. Allegro
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Trumpet Sonata in D Major, Z. 850: III. Allegro
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by artist: Ede Inhoff
by artist: Hungarian State Opera Chamber Orchestra
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  type: MusicAlbum
  date published: 2012-08-01
popularity: 5
genre: classical
genre: choral
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additional property: CopyrightID
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additional property: CopyrightRegisteredAt
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: 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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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T07:53:57Z
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Sonata a 5 in G Minor, Op. 2, No. 6: III. Grave
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Sonata a 5 in G Minor, Op. 2, No. 6: IV. Allegro
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  date published: 2026-07-08T03:53:27Z
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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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  date published: 2026-07-07T18:39:05Z
audio: 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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  date published: 2026-07-07T18:39:05Z
audio: 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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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Solomon, HWV 67, Act III: Sinfonia, "Arrival of the Queen of Sheba"
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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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Flute Concerto in D Major, Op. 10, No. 3, RV 428, "Il gardellino": II. Cantabile
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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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Der Messias, HWV 56: Messiah, HWV 56, Part II: Hallelujah! (Chorus)
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Coffee & Classical
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Opera Without Words - The Most Famous Overtures, Preludes, and Interludes in Opera
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track: Cavalleria Rusticana: Intermezzo
track: Eugene Onegin, Op. 24: Act III Scene 1: Polonaise
track: La gazza ladra (The Thieving Magpie): Overture
track: Eugene Onegin, Op. 24: Act II Scene 1: Waltz
track: La Gioconda, Act III: Dance of the Hours
track: Carmen: Carmen, Act III: Prelude
track: Lohengrin, Act III: Prelude
track: La traviata, Act I: Prelude
track: Der Freischutz, J. 277: Overture
track: Le nozze di Figaro (The Marriage of Figaro), K. 492: Overture
track: Il barbiere di Siviglia (The Barber of Seville): Il Barbiere di Siviglia (The Barber of Seville): Overture
track: Faust: Faust: Ballet music
track: Prince Igor, Act II: Polovtsian Dances
track: Guillaume Tell (William Tell): Overture

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Lohengrin, Act III: Prelude
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by artist: Slovak Philharmonic
by artist: Michael Halasz
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popularity: 3
genre: classical
genre: opera
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Lohengrin, Act III: Prelude
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La traviata, Act I: Prelude
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duration: PT3M56S
duration ms: 236666
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by artist: Slovak Radio Symphony Orchestra
by artist: Alexander Rahbari
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popularity: 4
genre: classical
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: La traviata, Act I: Prelude
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Der Freischutz, J. 277: Overture
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duration: PT10M28S
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by artist: Carl Maria von Weber
by artist: CSR Symphony Orchestra, Bratislava
by artist: Alfred Walter
in album: Opera Without Words - The Most Famous Overtures, Preludes, and Interludes in Opera
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popularity: 2
genre: classical
genre: opera
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Der Freischutz, J. 277: Overture
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Le nozze di Figaro (The Marriage of Figaro), K. 492: Overture
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duration: PT4M3S
duration ms: 243800
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Capella Istropolitana
by artist: Barry Wordsworth
in album: Opera Without Words - The Most Famous Overtures, Preludes, and Interludes in Opera
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popularity: 18
genre: classical
genre: classical-era
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: Le nozze di Figaro (The Marriage of Figaro), K. 492: Overture
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Il barbiere di Siviglia (The Barber of Seville): Il Barbiere di Siviglia (The Barber of Seville): Overture
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duration: PT7M46S
duration ms: 466000
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by artist: Gioachino Rossini
by artist: Zagreb Festival Orchestra
by artist: Michael Halasz
in album: Opera Without Words - The Most Famous Overtures, Preludes, and Interludes in Opera
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popularity: 16
genre: classical
genre: opera
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
audio: Il barbiere di Siviglia (The Barber of Seville): Il Barbiere di Siviglia (The Barber of Seville): Overture
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Faust: Faust: Ballet music
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by artist: CSR Symphony Orchestra, Bratislava
by artist: Ondrej Lenard
in album: Opera Without Words - The Most Famous Overtures, Preludes, and Interludes in Opera
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popularity: 2
genre: opera
isrc code: HKI190525507
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Faust: Faust: Ballet music
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Prince Igor, Act II: Polovtsian Dances
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by artist: Royal Philharmonic Orchestra
by artist: Adrian Leaper
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popularity: 15
genre: classical
genre: late-romantic-era
genre: early-modern-classical
genre: russian-romanticism
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additional property: CopyrightID
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: Prince Igor, Act II: Polovtsian Dances
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Classics at the Movies: Comedy 1
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