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subject of: OpenTimestamps Proof of Existence
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track: Brandenburg Concerto No. 1 F Major, BWV 1046: I. —
track: Brandenburg Concerto No. 1 F Major, BWV 1046: IV. Menuetto - Trio - Polonaise
track: Brandenburg Concerto No. 1 F Major, BWV 1046: II. Adagio
track: Brandenburg Concerto No. 1 F Major, BWV 1046: III. Allegro
track: Brandenburg Concerto No. 2 in F Major, BWV 1047: I. —
track: Brandenburg Concerto No. 2 in F Major, BWV 1047: II. Andante
track: Brandenburg Concerto No. 2 in F Major, BWV 1047: III. Allegro assai

Brandenburg Concerto No. 1 F Major, BWV 1046: I. —
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by artist: Johann Sebastian Bach
by artist: Marek Niewiedzial
by artist: Bettina Simon
by artist: Márton Brandisz
by artist: László Feriencsik
by artist: Krzysztof Stencel
by artist: Dániel Pálkövi
by artist: Zsolt Kallo
by artist: Capella Savaria
in album: Bach: Brandenburg Concertos
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  date published: 2016-05-06
genre: classical
genre: classical-piano
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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
audio: Brandenburg Concerto No. 1 F Major, BWV 1046: I. —
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Brandenburg Concerto No. 1 F Major, BWV 1046: IV. Menuetto - Trio - Polonaise
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by artist: Márton Brandisz
by artist: László Feriencsik
by artist: Krzysztof Stencel
by artist: Dániel Pálkövi
by artist: Zsolt Kallo
by artist: Capella Savaria
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Brandenburg Concerto No. 1 F Major, BWV 1046: IV. Menuetto - Trio - Polonaise
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Brandenburg Concerto No. 1 F Major, BWV 1046: II. Adagio
type: MusicRecording
duration: PT3M15S
duration ms: 195520
explicit: false
by artist: Johann Sebastian Bach
by artist: Marek Niewiedzial
by artist: Bettina Simon
by artist: Márton Brandisz
by artist: László Feriencsik
by artist: Krzysztof Stencel
by artist: Dániel Pálkövi
by artist: Zsolt Kallo
by artist: Capella Savaria
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genre: classical
genre: classical-piano
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  date published: 2026-07-31T08:26:41Z
audio: Brandenburg Concerto No. 1 F Major, BWV 1046: II. Adagio
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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

Brandenburg Concerto No. 1 F Major, BWV 1046: III. Allegro
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by artist: Marek Niewiedzial
by artist: Bettina Simon
by artist: Márton Brandisz
by artist: László Feriencsik
by artist: Krzysztof Stencel
by artist: Dániel Pálkövi
by artist: Zsolt Kallo
by artist: Capella Savaria
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genre: classical
genre: classical-piano
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  date published: 2026-07-31T19:53:13Z
audio: Brandenburg Concerto No. 1 F Major, BWV 1046: III. Allegro
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Brandenburg Concerto No. 2 in F Major, BWV 1047: I. —
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by artist: Gábor Prehoffer
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by artist: László Borsódy
by artist: Capella Savaria
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genre: classical
genre: classical-piano
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  date published: 2026-07-30T17:23:26Z
audio: Brandenburg Concerto No. 2 in F Major, BWV 1047: I. —
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Brandenburg Concerto No. 2 in F Major, BWV 1047: II. Andante
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by artist: László Borsódy
by artist: Capella Savaria
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genre: classical
genre: classical-piano
subject of: OpenTimestamps Proof of Existence
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Brandenburg Concerto No. 2 in F Major, BWV 1047: III. Allegro assai
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duration: PT2M47S
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by artist: Johann Sebastian Bach
by artist: Gábor Prehoffer
by artist: Marek Niewiedzial
by artist: Zsolt Kallo
by artist: László Borsódy
by artist: Capella Savaria
in album: Bach: Brandenburg Concertos
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genre: classical
genre: classical-piano
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audio: Brandenburg Concerto No. 2 in F Major, BWV 1047: III. Allegro assai
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