Errico Petrella
type: MusicGroup
description: thumb|Portrait of Errico Petrella by Émile Perrin Errico Petrella (10 December 18137 April 1877) was an Italian opera composer. Life and career thumb|left|Errico Petrella by Francesco Gonin Petrella
popularity: 3
followers: 140
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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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album: Petrella: Jone (Live)
  type: MusicAlbum
  date published: 1982
album: Petrella: Jone (Live)
  type: MusicAlbum
  date published: 2017-10-06
track: Jone
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  by artist: Errico Petrella
  by artist: Corrado Giuffredi
  by artist: Leonora Armellini
  in album: All'Opera! Original Clarinet solos by Italian composer
    type: MusicAlbum
    date published: 2022-11-02
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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: 2026-07-07T18:39:05Z
  audio: Jone
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    additional property: Key Name
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      value: Eb
    additional property: Mode Name
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