Giovanni Porta
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description: thumb|upright=1.2|Giovanni Porta thumb|upright=1.2|First page of Porta's Argippo score.Mus.2444-F-1 at Saxon State and University Library Dresden website Giovanni Porta (c. 1675 – 21 June 1755) was an
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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
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album: The Giovanni Theories
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  date published: 2019-10-04
album: Johnny Runaround
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  date published: 2023-10-25
track: Farnace: Aria «Non sempre grandina» (Farnace)
track: Sinfonia in D major, Schrank II/19/4: I. Allegro - Andante - Adagio
track: Sinfonia in D Major: I. Allegro
track: Patrona reverita
track: Ifigenia in Aulide, Act III Scene 13: Madre diletta, abbracciami (Ifigenia)

Farnace: Aria «Non sempre grandina» (Farnace)
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by artist: Vespres d'Arnadí
by artist: Giovanni Porta
by artist: Xavier Sabata
by artist: Dani Espasa
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: Farnace: Aria «Non sempre grandina» (Farnace)
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Sinfonia in D major, Schrank II/19/4: I. Allegro - Andante - Adagio
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duration: PT3M22S
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by artist: Giovanni Porta
by artist: Akademie für Alte Musik Berlin
by artist: Georg Kallweit
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  date published: 2026-07-08T08:56:20Z
audio: Sinfonia in D major, Schrank II/19/4: I. Allegro - Andante - Adagio
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Sinfonia in D Major: I. Allegro
type: MusicRecording
duration: PT1M38S
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by artist: Giovanni Porta
by artist: Europa Galante
by artist: Fabio Biondi
in album: Il Diario di Chiara: Music from La Pietà in Venice in the 18th century
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T19:35:34Z
audio: Sinfonia in D Major: I. Allegro
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additional property: OTSVerifyInstructions
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Patrona reverita
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duration: PT2M29S
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by artist: Giovanni Porta
by artist: Adèle Charvet
by artist: Le Consort
in album: Vivaldi, Chelleri & Ristori: Teatro Sant'Angelo
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T14:44:50Z
audio: Patrona reverita
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additional property: OTSVerifyInstructions
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Ifigenia in Aulide, Act III Scene 13: Madre diletta, abbracciami (Ifigenia)
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by artist: Sophie Junker
by artist: {oh!} Orkiestra
by artist: Martyna Pastuszka
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T21:09:47Z
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additional property: OTSVerifyInstructions
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