Laura Zannini
type: MusicGroup
genre: opera
popularity: 11
followers: 47
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8de4a7cae02988425961d53cbf2973d09bf703dd067dc99709dbfcaab5e5cdbf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953807
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953807
additional property: OTSProofURL
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additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/f4a8ecbf-7876-468d-b29f-c69d85d8c069.json
additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
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additional property: OTSVerifyInstructions
  type: PropertyValue
  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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de4a7cae02988425961d53cbf2973d09bf703dd067dc99709dbfcaab5e5cdbf. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4a8ecbf-7876-468d-b29f-c69d85d8c069.json and https://artists.proofprofile.net/proofs/artist/f4a8ecbf-7876-468d-b29f-c69d85d8c069.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T16:39:18Z
  text: {"copyright_id":"0x8de4a7cae02988425961d53cbf2973d09bf703dd067dc99709dbfcaab5e5cdbf","name":"Laura Zannini","registered_at":"2026-06-15T06:07:04Z","symbol":"NIM0705656","token_address":"0xf747c08789d55f86fa30729a9a6085a27ef6ca4b","type":"artist","uuid":"f4a8ecbf-7876-468d-b29f-c69d85d8c069"}
track: La Cenerentola, Act I: Aria. Una volta c'era un re
  type: MusicRecording
  duration: PT4M42S
  duration ms: 282946
  explicit: false
  by artist: Gioachino Rossini
  by artist: Teresa Berganza
  by artist: Margherita Guglielmi
  by artist: Laura Zannini
  by artist: Ugo Trama
  by artist: London Symphony Orchestra
  by artist: Claudio Abbado
  in album: Rossini: La Cenerentola
    type: MusicAlbum
    date published: 1972-01-01
  genre: classical
  genre: opera
  isrc code: DEF057130415
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057130415
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:30:09Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    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
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf0f5c421c4dcc9022b2998bfe82e8914be717a579d77d96c7d0422563d3067. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057130415.
    date published: 2026-07-02T03:30:09Z
  audio: La Cenerentola, Act I: Aria. Una volta c'era un re
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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      value: 1
    additional property: Time Signature
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    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
      type: PropertyValue
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    additional property: Speechiness
      type: PropertyValue
      value: 0.071
    additional property: Acousticness
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    additional property: Instrumentalness
      type: PropertyValue
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    additional property: Liveness
      type: PropertyValue
      value: 0.131
    additional property: Valence (Positivity)
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      value: 0.192
    additional property: Loudness (dB)
      type: PropertyValue
      value: -22.608
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major