Giovanni Maria Trabaci
type: MusicGroup
genre: medieval
description: thumb|Alleged portrait of Giovanni Maria Trabaci, Jusepe de Ribera Giovanni Maria Trabaci (ca. 1575 – 31 December 1647) was an Italian composer and organist. He was a prolific composer, with some 300
popularity: 7
followers: 422
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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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album: Trabaci: Keyboard Music, Book 2
  type: MusicAlbum
  date published: 2003-02-16
track: Canzona cromatica
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  by artist: Giovanni Maria Trabaci
  by artist: Cappella Mediterranea
  by artist: Leonardo García-Alarcón
  in album: Sigismondo d’India: Lamenti & sospiri
    type: MusicAlbum
    date published: 2021-06-04
  popularity: 4
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-30T14:44:50Z
  audio: Canzona cromatica
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track: Toccata Seconda & Ligature per l'arpa
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  by artist: Giovanni Maria Trabaci
  by artist: Arianna Savall
  in album: Le Labyrinthe d'Ariane
    type: MusicAlbum
    date published: 2021-07-29
  popularity: 3
  isrc code: CH4212000194
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T02:19:15Z
  audio: Toccata Seconda & Ligature per l'arpa
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track: Gagliarde a 5: Gagliarda prima a 5 detta la Galante

Liveness
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Gagliarde a 5: Gagliarda prima a 5 detta la Galante
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duration: PT3M31S
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by artist: Giovanni Maria Trabaci
by artist: L'Amoroso
by artist: Guido Balestracci
in album: Seconde Stravaganze: Venetian & Neapolitan Music for Viol Consort
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  date published: 2014-04-01
popularity: 2
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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: 2026-07-08T03:22:41Z
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