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Symphony No. 40 in G Minor, K. 550: I. Allegro molto
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  date published: 2026-07-02T11:38:34Z
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Le Carnaval des animaux, R. 125: IX. Le coucou au fond des bois
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  date published: 2026-07-02T03:55:08Z
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Orchestral Suite No. 2 in B Minor, BWV 1067: V. Polonaise - Double
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Flute Concerto in G Major: I. Spiritoso
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Flute Concerto in G Major: III. Allegro spiritoso
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Mozart For Sleep
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track: Horn Concerto No. 2 in E-Flat Major, K. 417: II. Andante
track: Piano Concerto No. 6 in B-Flat Major, K. 238: II. Andante un poco adagio
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Symphony No. 40 in G Minor, K. 550: II. Andante
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Horn Concerto No. 2 in E-Flat Major, K. 417: II. Andante
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Piano Concerto No. 6 in B-Flat Major, K. 238: II. Andante un poco adagio
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String Quartet No. 20 in D Major, K. 499, "hoffmeister": Iii. Adagio
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Piano Sonata No. 17 in B-Flat Major, K. 570: II. Adagio
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Symphony No. 39 in E-Flat Major, K. 543: II. Andante con moto
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Così fan tutte, K. 588, Act I Scene 2: Terzet - Soave sia il vento
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Piano Concerto No. 23 in A Major, K. 488: II. Adagio
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Mozart For Relaxation
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  subject of: OpenTimestamps Proof of Existence
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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
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  subject of: OpenTimestamps Proof of Existence
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track: Concerto for Flute and Harp in C Major, K. 299: Ii. Andantino
track: Horn Concerto No. 2 in E-flat Major, K. 417: Ii. Andante
track: String Quartet No. 12 in B-flat Major, K. 172: Ii. Adagio
track: Serenade No. 9 in D Major, K. 320, "posthorn": Andantino
track: Symphony No. 40 in G Minor, K. 550: Ii. Andante
track: Piano Concerto No. 5 in D Major, K. 175: Ii. Andante ma poco adagio
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OpenTimestamps Proof of Existence
type: DigitalDocument
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description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0e719cfca95da0ebc40d6ac033333a217864965629cf43f4518b091a2acad0. 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/HKI199274702.
date published: 2026-07-08T08:56:20Z

Serenade No. 13 in G Major, K. 525, "eine kleine Nachtmusik": Ii. Romanze: Andante
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Concerto for Flute and Harp in C Major, K. 299: Ii. Andantino
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Concerto for Flute and Harp in C Major, K. 299: Ii. Andantino
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Horn Concerto No. 2 in E-flat Major, K. 417: Ii. Andante
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Horn Concerto No. 2 in E-flat Major, K. 417: Ii. Andante
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String Quartet No. 12 in B-flat Major, K. 172: Ii. Adagio
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  date published: 2026-07-08T08:56:20Z
audio: String Quartet No. 12 in B-flat Major, K. 172: Ii. Adagio
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Serenade No. 9 in D Major, K. 320, "posthorn": Andantino
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subject of: OpenTimestamps Proof of Existence
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audio: Serenade No. 9 in D Major, K. 320, "posthorn": Andantino
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Symphony No. 40 in G Minor, K. 550: Ii. Andante
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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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Piano Concerto No. 5 in D Major, K. 175: Ii. Andante ma poco adagio
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subject of: OpenTimestamps Proof of Existence
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Piano Concerto No. 25 in C Major, K. 503: Ii. Andante
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subject of: OpenTimestamps Proof of Existence
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audio: Piano Concerto No. 25 in C Major, K. 503: Ii. Andante
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Symphony No. 14 in A Major, K. 114: Ii. Andante
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Symphony No. 14 in A Major, K. 114: Ii. Andante
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String Quartet No. 20 in D Major, K. 499, "hoffmeister": Iii. Adagio
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: String Quartet No. 20 in D Major, K. 499, "hoffmeister": Iii. Adagio
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Horn Concerto No. 4 in E-flat Major, K. 495: Ii. Romance: Andante cantabile
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  date published: 2026-07-08T03:53:27Z
audio: Horn Concerto No. 4 in E-flat Major, K. 495: Ii. Romance: Andante cantabile
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Vesperae solennes de Confessore, K. 339: V. Laudate Dominum
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Mozart: Kleine Nachtmusik (Eine) / Serenata Notturna / Divertimenti
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date published: 1988-02-05

50 of the Best: Mozart
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date published: 2011-11-15
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T08:56:20Z
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  by artist: Philharmonia Cassovia
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-07T13:52:39Z
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  subject of: OpenTimestamps Proof of Existence
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track: Ave verum corpus, K. 618
track: Piano Concerto No. 23 in A Major, K. 488: II. Adagio
track: Fantasia in D Minor, K. 397
track: Symphony No. 38 in D Major, K. 504, "Prague": III. Finale: Presto

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OTSVerificationAPI
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OTSVerifyInstructions
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OpenTimestamps Proof of Existence
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date published: 2026-07-08T03:53:27Z

Symphony No. 25 in G Minor, K. 183: I. Allegro con brio
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Ave verum corpus, K. 618
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by artist: Wolfgang Amadeus Mozart
by artist: St. Clement Concert Choir
by artist: St. Clement Concert Orchestra
by artist: Randall Swanson
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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: Ave verum corpus, K. 618
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Piano Concerto No. 23 in A Major, K. 488: II. Adagio
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by artist: Wolfgang Amadeus Mozart
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by artist: Concentus Hungaricus
by artist: Matyas Antal
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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: 2026-07-08T03:22:41Z
audio: Piano Concerto No. 23 in A Major, K. 488: II. Adagio
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Fantasia in D Minor, K. 397
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by artist: Wolfgang Amadeus Mozart
by artist: Janos Sebestyen
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genre: classical
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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: 2026-07-08T03:20:19Z
audio: Fantasia in D Minor, K. 397
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Symphony No. 38 in D Major, K. 504, "Prague": III. Finale: Presto
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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Martin Turnovský. Great Czech Conductors
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A Master of the Viola
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Dvořák: Symphony No. 5 & Fibich: Toman
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Coleccion Clasicos, Haydn: Symphonies Nos. 92 & 103
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Schmitt / Stravinsky / Naumann / Dvorak: Works for Wind Instruments
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Pastores surgite. Latin Pastorals of the Czech Classical Period
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Morthenson: Paraphonia / Dahl: Saxophone Concerto / Gregson: Tuba Concerto / Keuris: Catena
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Mozart: Serenade No. 9, 'Posthorn' / Notturno
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Krommer - Hummel - Martinu: Oboe Concertos
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Martinu : Symphony No.4, Piano Concerto No.4 & 3 Ricercari
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Dvořák: Serenade in D minor Op. 44, Serenade in E Major, Op. 22
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Haydn: Symphony Nos. 94 & 101
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Bartók & Ravel: Piano Concertos
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Rosetti & C. Stamitz: Flute Concertos (Mono Version)
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additional property: Mode Name
  type: PropertyValue
  value: Minor

The Best Of Ksč (Vybrané České Masové Písně Ve Vzorové Interpretaci)
type: MusicAlbum
date published: 2013-02-24
track: Internacionála
  type: MusicRecording
  duration: PT2M29S
  duration ms: 149626
  explicit: false
  by artist: Jiří Pinkas
  by artist: Pěvecký sbor Čs. rozhlasu
  by artist: Symfonický orchestr Čs. rozhlasu v Praze
  in album: The Best Of Ksč (Vybrané České Masové Písně Ve Vzorové Interpretaci)
    type: MusicAlbum
    date published: 2013-02-24
  popularity: 10
  isrc code: CZA165200048
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-24T16:13:33+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x42190f1002c176c2dfcb23d11ec4eded2afe6224c14fce1b5872ecf7f52b2320
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA165200048
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42190f1002c176c2dfcb23d11ec4eded2afe6224c14fce1b5872ecf7f52b2320. 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/CZA165200048.
    date published: 2026-07-02T03:55:08Z
  audio: Internacionála
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 110.731
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.449
    additional property: Energy
      type: PropertyValue
      value: 0.373
    additional property: Speechiness
      type: PropertyValue
      value: 0.031
    additional property: Acousticness
      type: PropertyValue
      value: 0.936
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.171
    additional property: Liveness
      type: PropertyValue
      value: 0.109
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.755
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.985
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Kupředu, Zpátky Ni Krok!
  type: MusicRecording
  duration: PT5M7S
  duration ms: 307773
  explicit: false
  by artist: Pavel Roskol
  in album: The Best Of Ksč (Vybrané České Masové Písně Ve Vzorové Interpretaci)
    type: MusicAlbum
    date published: 2013-02-24
  popularity: 7
  isrc code: CZA165500035
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T18:23:52+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xad820e0eae9726109482bbb30c87c98bf3c50881ef03336778ec03d6d0ffbe6c
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA165500035
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  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
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad820e0eae9726109482bbb30c87c98bf3c50881ef03336778ec03d6d0ffbe6c. 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/CZA165500035.
    date published: 2026-07-08T03:20:19Z
  audio: Kupředu, Zpátky Ni Krok!
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 127.268
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.561
    additional property: Energy
      type: PropertyValue
      value: 0.502
    additional property: Speechiness
      type: PropertyValue
      value: 0.037
    additional property: Acousticness
      type: PropertyValue
      value: 0.872
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.002
    additional property: Liveness
      type: PropertyValue
      value: 0.093
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.541
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.862
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Kamarádi - Česká Mládežnická
  type: MusicRecording
  duration: PT2M16S
  duration ms: 136933
  explicit: false
  by artist: František Vajnar
  by artist: Pěvecký sbor Čs. rozhlasu
  by artist: Pražský rozhlasový orchestr
  in album: The Best Of Ksč (Vybrané České Masové Písně Ve Vzorové Interpretaci)
    type: MusicAlbum
    date published: 2013-02-24
  popularity: 4
  isrc code: CZA165800085
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T00:20:24+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xbd246793515bc55e223ae0588d23cb91443466d525494762c745764b56c8b473
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957124
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Kamarádi - Česká Mládežnická
track: Rudý Prapor
track: Zítřek Je Náš - Píseň Druhé Pětiletky
track: Zemědělská

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/957124

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA165800085

OTSTimestamp
type: PropertyValue
value: 2026-07-08T03:53:27Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd246793515bc55e223ae0588d23cb91443466d525494762c745764b56c8b473. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZA165800085.
date published: 2026-07-08T03:53:27Z

Kamarádi - Česká Mládežnická
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 127.815
additional property: Musical Key
  type: PropertyValue
  value: 5
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.697
additional property: Energy
  type: PropertyValue
  value: 0.526
additional property: Speechiness
  type: PropertyValue
  value: 0.031
additional property: Acousticness
  type: PropertyValue
  value: 0.938
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.061
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.59
additional property: Loudness (dB)
  type: PropertyValue
  value: -9.726
additional property: Key Name
  type: PropertyValue
  value: F
additional property: Mode Name
  type: PropertyValue
  value: Major

Rudý Prapor
type: MusicRecording
duration: PT3M16S
duration ms: 196360
explicit: false
by artist: Pavel Vondruška
by artist: Armádní umělecký soubor Víta Nejedlého
in album: The Best Of Ksč (Vybrané České Masové Písně Ve Vzorové Interpretaci)
  type: MusicAlbum
  date published: 2013-02-24
popularity: 3
isrc code: CZA165700079
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T04:28:20+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5ea768bdf8dcdc6411bc53e2d7c90a60dd9bd2e1d4d35cbd3535379837067732
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957124
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957124
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA165700079
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:53:27Z
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea768bdf8dcdc6411bc53e2d7c90a60dd9bd2e1d4d35cbd3535379837067732. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZA165700079.
  date published: 2026-07-08T03:53:27Z
audio: Rudý Prapor
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 133.438
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.511
  additional property: Energy
    type: PropertyValue
    value: 0.835
  additional property: Speechiness
    type: PropertyValue
    value: 0.119
  additional property: Acousticness
    type: PropertyValue
    value: 0.872
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.012
  additional property: Liveness
    type: PropertyValue
    value: 0.146
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.318
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.374
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Zítřek Je Náš - Píseň Druhé Pětiletky
type: MusicRecording
duration: PT3M30S
duration ms: 210533
explicit: false
by artist: Jaroslav Navrátil
by artist: Roman Horák
in album: The Best Of Ksč (Vybrané České Masové Písně Ve Vzorové Interpretaci)
  type: MusicAlbum
  date published: 2013-02-24
popularity: 2
isrc code: CZA165600070
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T16:29:48+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe4746245d9f8caac764f8b5b5a6174aaedaae6c20ef8d280e1971e53f058a0f5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957124
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957124
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA165600070
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:53:27Z
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4746245d9f8caac764f8b5b5a6174aaedaae6c20ef8d280e1971e53f058a0f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZA165600070.
  date published: 2026-07-08T03:53:27Z
audio: Zítřek Je Náš - Píseň Druhé Pětiletky
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 125.53
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.526
  additional property: Energy
    type: PropertyValue
    value: 0.713
  additional property: Speechiness
    type: PropertyValue
    value: 0.051
  additional property: Acousticness
    type: PropertyValue
    value: 0.949
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.136
  additional property: Liveness
    type: PropertyValue
    value: 0.363
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.59
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.765
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Zemědělská
type: MusicRecording
duration: PT3M27S
duration ms: 207573
explicit: false
by artist: Jaroslav Navrátil
by artist: Roman Horák
by artist: Libuše Volková
by artist: Jana Polivkova
in album: The Best Of Ksč (Vybrané České Masové Písně Ve Vzorové Interpretaci)
  type: MusicAlbum
  date published: 2013-02-24
popularity: 1
isrc code: CZA165800086
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T13:22:30+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x262b7d6b72d2c62a85180b08e285b4a299853bee1b9692853a7139d951c11420
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957145
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA165800086
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T08:56:20Z
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262b7d6b72d2c62a85180b08e285b4a299853bee1b9692853a7139d951c11420. 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/CZA165800086.
  date published: 2026-07-08T08:56:20Z
audio: Zemědělská
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 142.614
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.589
  additional property: Energy
    type: PropertyValue
    value: 0.635
  additional property: Speechiness
    type: PropertyValue
    value: 0.069
  additional property: Acousticness
    type: PropertyValue
    value: 0.905
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.304
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.285
  additional property: Loudness (dB)
    type: PropertyValue
    value: -10.702
  additional property: Key Name
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  additional property: Mode Name
    type: PropertyValue
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The Many Loves of Antonín Dvořák
type: MusicAlbum
date published: 2021-09-10
track: Slavonic Dances, Series II, Op. 72: Mazur - Allegretto grazioso
  type: MusicRecording
  duration: PT6M3S
  duration ms: 363266
  explicit: false
  by artist: Antonín Dvořák
  by artist: Czech Philharmonic
  by artist: Karel Sejna
  in album: The Many Loves of Antonín Dvořák
    type: MusicAlbum
    date published: 2021-09-10
  genre: classical
  genre: late-romantic-era
  genre: czech-classical
  isrc code: CZA166002036
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-18T16:19:20+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x92c9bdd5241dc80adfe8153ae7fa134cd9b63bb5dbea58c3263a65825a589fd7
  additional property: OTSHash
  additional property: OTSBitcoinBlock
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    value: 956302
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956302
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA166002036
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:30:09Z
  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
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c9bdd5241dc80adfe8153ae7fa134cd9b63bb5dbea58c3263a65825a589fd7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZA166002036.
    date published: 2026-07-02T03:30:09Z
  audio: Slavonic Dances, Series II, Op. 72: Mazur - Allegretto grazioso
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
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    additional property: Musical Key
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Benda, Stamitz and Rosetti: Flute Concertos
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Mozart pro lepší učení, koncentraci a paměť
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The Cello
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La crème de la crème: Mozart
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Pionýrské Písně (Vybral A Sestavil Zdeněk Petr)
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Korte: Sinfonietta, Songs of Troubadours, The Story of the Flutes
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Martinu & Strauss Oboe Concertos
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Musica nova - Bohemica et Slovenica (Kalabis - Symphony No. 2, Ištvan - Ballad of the South)
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Hurník: Šulamit - Novák: Passer Catulli - Eben: Loveless Songs
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Železný & Feld Works for Violin and Orchestra
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Ravel: Shéhérazade - Chausson: Poème de l'amour et de la me
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