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subject of: OpenTimestamps Proof of Existence
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album: Jiránek: Concertos. Music from 18th Century Prague
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  date published: 2016-10-21
  track: Violin Concerto in D Major: I. Allegro
album: Musici da camera. Music from 18th Century Prague
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  track: Quartet for Violin, Cello, Bassoon and Basso continuo in G Minor: I. Adagio
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    additional property: OTSVerifyInstructions
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-02T05:09:12Z
    audio: Quartet for Violin, Cello, Bassoon and Basso continuo in G Minor: I. Adagio
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album: Jiránek: Concertos & Sinfonias, Music from Eighteenth-Century, Prague
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  date published: 2010-10-22
  track: Sinfonia in D Major: II. Andante
  track: Concerto for Bassoon, Strings and Basso continuo in G Minor: I. Adagio - Un poco allegro - Adagio - Allegro
  track: Concerto for Flute, Strings and Basso continuo in G Major: I. Allegro moderato
  track: Sinfonia in D Major: I. Allegro
album: Il violino Boemo. Music from 18th Century Prague
  type: MusicAlbum
  date published: 2014-01-24
album: The Four Seasons
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  date published: 2016-09-09

Violin Concerto in D Major: I. Allegro
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by artist: Collegium Marianum
by artist: Lenka Torgersen
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  date published: 2026-07-08T03:22:41Z
audio: Violin Concerto in D Major: I. Allegro
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Sinfonia in D Major: II. Andante
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by artist: Collegium Marianum
by artist: Sergio Azzolini
by artist: Marina Katarzhnova
by artist: Jana Semeradova
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  date published: 2026-07-08T08:56:20Z
audio: Sinfonia in D Major: II. Andante
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Concerto for Bassoon, Strings and Basso continuo in G Minor: I. Adagio - Un poco allegro - Adagio - Allegro
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duration: PT5M20S
duration ms: 320586
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by artist: Frantisek Jiranek
by artist: Collegium Marianum
by artist: Sergio Azzolini
by artist: Marina Katarzhnova
by artist: Jana Semeradova
in album: Jiránek: Concertos & Sinfonias, Music from Eighteenth-Century, Prague
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  date published: 2026-08-01T01:44:32Z
audio: Concerto for Bassoon, Strings and Basso continuo in G Minor: I. Adagio - Un poco allegro - Adagio - Allegro
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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 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

Concerto for Flute, Strings and Basso continuo in G Major: I. Allegro moderato
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duration: PT3M47S
duration ms: 227986
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by artist: Collegium Marianum
by artist: Sergio Azzolini
by artist: Marina Katarzhnova
by artist: Jana Semeradova
in album: Jiránek: Concertos & Sinfonias, Music from Eighteenth-Century, Prague
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T19:53:13Z
audio: Concerto for Flute, Strings and Basso continuo in G Major: I. Allegro moderato
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additional property: OTSVerifyInstructions
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Sinfonia in D Major: I. Allegro
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by artist: Marina Katarzhnova
by artist: Jana Semeradova
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  date published: 2026-07-31T23:30:38Z
audio: Sinfonia in D Major: I. Allegro
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    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.425
  additional property: Energy
    type: PropertyValue
    value: 0.245
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.915
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.006
  additional property: Liveness
    type: PropertyValue
    value: 0.129
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.515
  additional property: Loudness (dB)
    type: PropertyValue
    value: -19.196
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: CZA161002769
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960478
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T23:30:38+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA161002769
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960478
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960478
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T23:30:38+00:00
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 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