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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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track: Swan Lake: Scene
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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 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
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
  audio: Swan Lake: Scene
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track: Serenade No. 13 in G Major, K. 525, "Eine kleine Nachtmusik"
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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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track: Piano Concerto No. 23 in A Major, K. 488: II. Andante
track: Flute Concerto No. 2 in D Major, K. 314: I. Allegro aperto
track: Symphony No. 40 in G Minor, K. 550 "Great": I. Molto allegro
track: The Marriage of Figaro, K. 492: Overture
track: Clarinet Concerto in A Major, K. 622: II. Adagio
track: Serenade No. 11 in E-Flat Major, K. 375: III. Adagio
track: Piano Sonata No. 11 in A Major, K. 331, "Turkish March": III. Rondo: Alla turca (Allegretto)
track: Horn Concerto No. 3 in E-Flat Major, K. 447: I. Allegro
track: Cassation in B-Flat Major, K. 99: VI. Menuet
track: Requiem in D Minor, K 626: I. Introitus: Requiem aeternam
track: Requiem in D Minor, K 626: II. Kyrie eleison
track: Concerto for Piano & Orchestra No. 9 in E-Flat Major, K. 271, "Jeunehomme": I. Allegro
track: Requiem in D Minor, K 626: III. Sequentia: Dies irae
track: Serenade No. 7 in D Major, K. 250, "Haffner": I. Allegro maestoso - Allegro molto
track: Serenade No. 7 in D Major, K. 250, "Haffner": II. Andante

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Piano Concerto No. 23 in A Major, K. 488: II. Andante
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by artist: London Festival Orchestra
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T19:35:34Z
audio: Piano Concerto No. 23 in A Major, K. 488: II. Andante
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Flute Concerto No. 2 in D Major, K. 314: I. Allegro aperto
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by artist: Ferdinand Lang
by artist: London Festival Orchestra
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genre: classical
genre: classical-era
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genre: opera
genre: chamber-music
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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
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Symphony No. 40 in G Minor, K. 550 "Great": I. Molto allegro
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T02:05:19Z
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T21:51:49Z
audio: The Marriage of Figaro, K. 492: Overture
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Clarinet Concerto in A Major, K. 622: II. Adagio
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duration: PT7M1S
duration ms: 421000
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by artist: Wolfgang Amadeus Mozart
by artist: Ernst Kohl
by artist: Ferdinand Lang
by artist: London Festival Orchestra
in album: Mozart For Brain Power
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  date published: 2008-01-01
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T19:35:34Z
audio: Clarinet Concerto in A Major, K. 622: II. Adagio
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Serenade No. 11 in E-Flat Major, K. 375: III. Adagio
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duration: PT3M2S
duration ms: 182000
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by artist: Wolfgang Amadeus Mozart
by artist: Ernst Kohl
by artist: Ferdinand Lang
by artist: London Festival Orchestra
in album: Mozart For Brain Power
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  date published: 2008-01-01
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T00:26:26Z
audio: Serenade No. 11 in E-Flat Major, K. 375: III. Adagio
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Piano Sonata No. 11 in A Major, K. 331, "Turkish March": III. Rondo: Alla turca (Allegretto)
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duration: PT3M41S
duration ms: 221000
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Denis Matthews
by artist: Ferdinand Lang
by artist: London Festival Orchestra
in album: Mozart For Brain Power
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  date published: 2008-01-01
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
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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: 2026-07-29T23:39:29Z
audio: Piano Sonata No. 11 in A Major, K. 331, "Turkish March": III. Rondo: Alla turca (Allegretto)
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Horn Concerto No. 3 in E-Flat Major, K. 447: I. Allegro
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duration: PT8M0S
duration ms: 480000
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by artist: Wolfgang Amadeus Mozart
by artist: Barry Tuckwell
by artist: Ferdinand Lang
by artist: London Festival Orchestra
in album: Mozart For Brain Power
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genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
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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: 2026-07-30T18:23:33Z
audio: Horn Concerto No. 3 in E-Flat Major, K. 447: I. Allegro
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Cassation in B-Flat Major, K. 99: VI. Menuet
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duration: PT5M10S
duration ms: 310333
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by artist: Wolfgang Amadeus Mozart
by artist: London Festival Orchestra
by artist: Ferdinand Lang
in album: Mozart For Brain Power
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genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
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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 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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Cassation in B-Flat Major, K. 99: VI. Menuet
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Requiem in D Minor, K 626: I. Introitus: Requiem aeternam
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duration ms: 310626
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by artist: London Festival Orchestra
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genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
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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: 2026-07-30T20:35:49Z
audio: Requiem in D Minor, K 626: I. Introitus: Requiem aeternam
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Requiem in D Minor, K 626: II. Kyrie eleison
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by artist: London Festival Orchestra
by artist: Ferdinand Lang
in album: Mozart For Brain Power
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  date published: 2008-01-01
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-08-01T00:15:43Z
audio: Requiem in D Minor, K 626: II. Kyrie eleison
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Concerto for Piano & Orchestra No. 9 in E-Flat Major, K. 271, "Jeunehomme": I. Allegro
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by artist: Ferdinand Lang
by artist: London Festival Orchestra
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genre: classical-era
genre: classical-piano
genre: opera
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T14:36:16Z
audio: Concerto for Piano & Orchestra No. 9 in E-Flat Major, K. 271, "Jeunehomme": I. Allegro
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Requiem in D Minor, K 626: III. Sequentia: Dies irae
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by artist: London Festival Orchestra
by artist: Ferdinand Lang
in album: Mozart For Brain Power
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  date published: 2008-01-01
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
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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: Requiem in D Minor, K 626: III. Sequentia: Dies irae
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Serenade No. 7 in D Major, K. 250, "Haffner": I. Allegro maestoso - Allegro molto
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by artist: Wolfgang Amadeus Mozart
by artist: London Festival Orchestra
by artist: Ferdinand Lang
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genre: classical
genre: classical-era
genre: classical-piano
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: 2026-07-30T17:23:26Z
audio: Serenade No. 7 in D Major, K. 250, "Haffner": I. Allegro maestoso - Allegro molto
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Serenade No. 7 in D Major, K. 250, "Haffner": II. Andante
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T04:14:58Z
audio: Serenade No. 7 in D Major, K. 250, "Haffner": II. Andante
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