Sergio Leonardi
type: MusicGroup
genre: italo disco
description: Sergio Leonardi (born 26 March 1944) is an Italian singer and actor. Life and career Born in Rome, Leonardi started performing as an impersonator and singer at 16 years old. Noted by producer and s
popularity: 7
followers: 848
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x06d135d2b796e79789a81fa54d4d4b5d3d9eef28288c8407052feb53d1e60965
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ef372361-8f42-4cca-a1df-0b00f1ca6027.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ef372361-8f42-4cca-a1df-0b00f1ca6027.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ef372361-8f42-4cca-a1df-0b00f1ca6027
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x06d135d2b796e79789a81fa54d4d4b5d3d9eef28288c8407052feb53d1e60965","name":"Sergio Leonardi","registered_at":"2026-06-21T12:27:25Z","symbol":"NIM1922727","token_address":"0x824e16db0e8976ef1c321f3c5d56069212d9e1c1","type":"artist","uuid":"ef372361-8f42-4cca-a1df-0b00f1ca6027"}
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d135d2b796e79789a81fa54d4d4b5d3d9eef28288c8407052feb53d1e60965. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef372361-8f42-4cca-a1df-0b00f1ca6027.json and https://artists.proofprofile.net/proofs/artist/ef372361-8f42-4cca-a1df-0b00f1ca6027.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0x06d135d2b796e79789a81fa54d4d4b5d3d9eef28288c8407052feb53d1e60965","name":"Sergio Leonardi","registered_at":"2026-06-21T12:27:25Z","symbol":"NIM1922727","token_address":"0x824e16db0e8976ef1c321f3c5d56069212d9e1c1","type":"artist","uuid":"ef372361-8f42-4cca-a1df-0b00f1ca6027"}
album: Melania
  type: MusicAlbum
  date published: 1975-08-01
album: Siamo in confidenza
  type: MusicAlbum
  date published: 1976-08-01
  track: Siamo in confidenza
    type: MusicRecording
    duration: PT3M18S
    duration ms: 198666
    explicit: false
    by artist: Sergio Leonardi
    in album: Siamo in confidenza
      type: MusicAlbum
      date published: 1976-08-01
    genre: italo disco
    isrc code: ITA641708269
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T23:32:46+00:00
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      type: PropertyValue
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    additional property: OTSHash
    additional property: OTSBitcoinBlock
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      value: 958468
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958468
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITA641708269
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T00:27:51Z
    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 0x6df659861c408319675e4fde2939fa64f30c4ad28b2fc6ea024078b2d2262741. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ITA641708269.
      date published: 2026-07-18T00:27:51Z
    audio: Siamo in confidenza
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 121.497
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.629
      additional property: Energy
        type: PropertyValue
        value: 0.744
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.024
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.057
      additional property: Liveness
        type: PropertyValue
        value: 0.196
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.787
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.85
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Ricomincio da fred
  type: MusicAlbum
  date published: 1991
album: Ricomincio da fred
  type: MusicAlbum
  date published: 1991-01-01
album: Il meglio
  type: MusicAlbum
  date published: 1997
album: Love in Portofino
  type: MusicAlbum
  date published: 1999
album: Non Ti Scordar Di Me
  type: MusicAlbum
  date published: 1999
album: Non ti scordar di me
  type: MusicAlbum
  date published: 2011-12-25
album: I miei successi
  type: MusicAlbum
  date published: 2015-10-13