I Califfi
type: MusicGroup
genre: progressive rock
popularity: 6
followers: 2179
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7aa388a810edd54895bd17db9a05279633ebebbba2cedc11ac37bea773987382
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953877
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953877
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0247f4e1-721f-46f2-a6d3-7fb9384dd7da.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0247f4e1-721f-46f2-a6d3-7fb9384dd7da.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0247f4e1-721f-46f2-a6d3-7fb9384dd7da
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T02:39:16Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7aa388a810edd54895bd17db9a05279633ebebbba2cedc11ac37bea773987382","name":"I Califfi","registered_at":"2026-06-15T14:26:26Z","symbol":"NIM0736511","token_address":"0x49f056183cca4db3cdf8646d14313a0608a7c567","type":"artist","uuid":"0247f4e1-721f-46f2-a6d3-7fb9384dd7da"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa388a810edd54895bd17db9a05279633ebebbba2cedc11ac37bea773987382. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0247f4e1-721f-46f2-a6d3-7fb9384dd7da.json and https://artists.proofprofile.net/proofs/artist/0247f4e1-721f-46f2-a6d3-7fb9384dd7da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0x7aa388a810edd54895bd17db9a05279633ebebbba2cedc11ac37bea773987382","name":"I Califfi","registered_at":"2026-06-15T14:26:26Z","symbol":"NIM0736511","token_address":"0x49f056183cca4db3cdf8646d14313a0608a7c567","type":"artist","uuid":"0247f4e1-721f-46f2-a6d3-7fb9384dd7da"}
album: Fiore di metallo
  type: MusicAlbum
  date published: 1973
album: Il meglio
  type: MusicAlbum
  date published: 1996-06-13
album: Al Mattino
  type: MusicAlbum
  date published: 1997-01-01
album: Italian Classics: I Califfi Collection, Vol. 1
  type: MusicAlbum
  date published: 2010-01-09
  track: Così ti amo (To Love Somebody)
    type: MusicRecording
    duration: PT2M43S
    duration ms: 163226
    explicit: false
    by artist: I Califfi
    in album: Italian Classics: I Califfi Collection, Vol. 1
      type: MusicAlbum
      date published: 2010-01-09
    genre: progressive rock
    isrc code: ITA646800907
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T10:20:02+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xc39f31846ddaddb99d3a8c8134568aa33a55fb6f91da5ae79b6f55934d9b7d46
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956551
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956551
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITA646800907
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T21:18:05Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39f31846ddaddb99d3a8c8134568aa33a55fb6f91da5ae79b6f55934d9b7d46. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITA646800907.
      date published: 2026-07-03T21:18:05Z
    audio: Così ti amo (To Love Somebody)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 94.399
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.483
      additional property: Energy
        type: PropertyValue
        value: 0.446
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.919
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.198
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.262
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.698
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Italian Classics: I Califfi Collection, Vol. 2
  type: MusicAlbum
  date published: 2010-01-09
album: I nostri successi
  type: MusicAlbum
  date published: 2015-08-29