Ring Around Quartet
type: MusicGroup
genre: choral
description: The Ring Around Quartet is an Italian vocal quartet active in early music. The Ring Around Quartet was founded in Genoa in 1993 by Vera Marenco and Umberto Bartolini. the members are Vera Marenco (
popularity: 4
followers: 97
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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: Musiche per Van Dyck - Chanson e Madrigali dei secoli XVI e XX
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  date published: 1997-03-15
album: Gioco di voci
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  track: Je ne l'ose dire
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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: 2026-07-22T07:19:23Z
    audio: Je ne l'ose dire
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  track: Tant que vivray
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T03:22:41Z
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  track: The Elves' Dance
  track: Madonna, mia pietà
  track: Le chant des oiseaux
  track: Mille regretz
album: Natale in canto
album: À Janequin - La Bataille de Marignan et autres chansons

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The Elves' Dance
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T16:07:24Z
audio: The Elves' Dance
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Madonna, mia pietà
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genre: choral
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Madonna, mia pietà
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Le chant des oiseaux
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Le chant des oiseaux
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Mille regretz
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
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    type: PropertyValue
    value: 0.453
  additional property: Liveness
    type: PropertyValue
    value: 0.111
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.039
  additional property: Loudness (dB)
    type: PropertyValue
    value: -29.106
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Natale in canto
type: MusicAlbum
date published: 2015-10-09

À Janequin - La Bataille de Marignan et autres chansons
type: MusicAlbum
date published: 2024-07-01