Les Solistes des Musiciens du Louvre
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subject of: OpenTimestamps Proof of Existence
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track: Piano Trio Movement in B Flat Major, K.501a
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  by artist: Wolfgang Amadeus Mozart
  by artist: Les Solistes des Musiciens du Louvre
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    date published: 2025-01-03
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  genre: classical-era
  genre: classical-piano
  genre: opera
  genre: chamber-music
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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: 2026-07-31T15:20:15Z
  audio: Piano Trio Movement in B Flat Major, K.501a
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track: Piano Trio in E Major, K.542 - Start of Finale
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  by artist: Les Solistes des Musiciens du Louvre
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T15:20:15Z
  audio: Piano Trio in E Major, K.542 - Start of Finale
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track: Piano Trio K.495a, Start of First Movement in G (Fragment)

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Piano Trio K.495a, Start of First Movement in G (Fragment)
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by artist: Wolfgang Amadeus Mozart
by artist: Les Solistes des Musiciens du Louvre
in album: A Classical Journey with Mozart
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  date published: 2024-12-06
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genre: classical-era
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genre: opera
genre: chamber-music
genre: concerto
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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: Piano Trio K.495a, Start of First Movement in G (Fragment)
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