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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 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: 2026-06-15T16:39:18Z
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  by artist: Martti Talvela
  by artist: Ingrid Mayr
  by artist: Horst Nitsche
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  by artist: Wolfgang Scheider
  by artist: Rachel Yakar
  by artist: Zdzislawa Donat
  by artist: Karl Terkal
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  by artist: Eric Tappy
  by artist: Christian Spatzek
  by artist: Vienna State Opera Chorus
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    date published: 2016-12-09
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  genre: classical-era
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  genre: chamber-music
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  additional property: OTSVerifyInstructions
    type: PropertyValue
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-06-13T13:32:09Z
  audio: Die Zauberflöte, K. 620: Pa-Pa-Pa-Papagena!
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track: Die Zauberflöte, K. 620: Pa-Pa-Pa-Papagena!
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  by artist: Wiener Philharmoniker
  by artist: Ileana Cotrubas
  by artist: Christian Boesch
  by artist: Trudeliese Schmidt
  by artist: Horst Hiestermann
  by artist: Peter Weber
  by artist: Helge von Bomches
  by artist: Gerhard Panzenböck
  by artist: Christian Baumgartner
  by artist: José van Dam
  by artist: Martti Talvela
  by artist: Ingrid Mayr
  by artist: Horst Nitsche
  by artist: Markus Huber
  by artist: Gerhard Eder
  by artist: Wolfgang Scheider
  by artist: Rachel Yakar
  by artist: Zdzislawa Donat
  by artist: Karl Terkal
  by artist: Fritz Peschke
  by artist: Elizabeth Kales
  by artist: Thomas Paulsen
  by artist: Eric Tappy
  by artist: Christian Spatzek
  by artist: Vienna State Opera Chorus
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  subject of: OpenTimestamps Proof of Existence
  audio: Die Zauberflöte, K. 620: Pa-Pa-Pa-Papagena!
track: Der Rosenkavalier, Op. 59, Act I: Selbstverständlich empfängt mich Ihro Gnaden
track: Der Rosenkavalier, Op. 59, Act I: Die Zeit, die ist ein sonderbar Ding – Mein schöner Schatz – ich werde jetzt

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OTSBitcoinBlockVerifyURL
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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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
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date published: 2026-07-06T06:56:49Z

Die Zauberflöte, K. 620: Pa-Pa-Pa-Papagena!
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additional property: Tempo (BPM)
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Der Rosenkavalier, Op. 59, Act I: Selbstverständlich empfängt mich Ihro Gnaden
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duration: PT9M29S
duration ms: 569293
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by artist: Richard Strauss
by artist: Anna Tomowa-Sintow
by artist: Agnes Baltsa
by artist: Adolf Tomaschek
by artist: Johann Reinprecht
by artist: Kurt Equiluz
by artist: Wolfgang Scheider
by artist: Kurt Moll
by artist: Gerhard Panzenbock
by artist: Wiener Philharmoniker
by artist: Herbert von Karajan
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genre: classical
genre: opera
genre: orchestra
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additional property: OTSVerificationAPI
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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 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
  type: DigitalDocument
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  date published: 2026-07-08T03:20:19Z
audio: Der Rosenkavalier, Op. 59, Act I: Selbstverständlich empfängt mich Ihro Gnaden
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Der Rosenkavalier, Op. 59, Act I: Die Zeit, die ist ein sonderbar Ding – Mein schöner Schatz – ich werde jetzt
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by artist: Anna Tomowa-Sintow
by artist: Agnes Baltsa
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by artist: Wiener Philharmoniker
by artist: Herbert von Karajan
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genre: classical
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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
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