F2F Crew
type: MusicGroup
popularity: 2
followers: 48
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf4a5cbf783cfe08f9a352f85b1a989b0012960c44148d29c19b866b3b2c05e62
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954500
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954500
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9bac1de2-8f89-482a-ab59-3d291c440ad5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9bac1de2-8f89-482a-ab59-3d291c440ad5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9bac1de2-8f89-482a-ab59-3d291c440ad5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T04:47:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf4a5cbf783cfe08f9a352f85b1a989b0012960c44148d29c19b866b3b2c05e62","name":"F2F Crew","registered_at":"2026-06-20T03:56:04Z","symbol":"NIM1504333","token_address":"0xbbf80ac444e26e1b082404433b033d654eddec35","type":"artist","uuid":"9bac1de2-8f89-482a-ab59-3d291c440ad5"}
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 0xf4a5cbf783cfe08f9a352f85b1a989b0012960c44148d29c19b866b3b2c05e62. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bac1de2-8f89-482a-ab59-3d291c440ad5.json and https://artists.proofprofile.net/proofs/artist/9bac1de2-8f89-482a-ab59-3d291c440ad5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T04:47:29Z
  text: {"copyright_id":"0xf4a5cbf783cfe08f9a352f85b1a989b0012960c44148d29c19b866b3b2c05e62","name":"F2F Crew","registered_at":"2026-06-20T03:56:04Z","symbol":"NIM1504333","token_address":"0xbbf80ac444e26e1b082404433b033d654eddec35","type":"artist","uuid":"9bac1de2-8f89-482a-ab59-3d291c440ad5"}
album: La notte è magica
  type: MusicAlbum
  date published: 2017-07-03
album: We Are Face2Face
  type: MusicAlbum
  date published: 2019-03-05
  track: We Are Face2Face
    type: MusicRecording
    duration: PT3M34S
    duration ms: 214090
    explicit: false
    by artist: F2F Crew
    in album: We Are Face2Face
      type: MusicAlbum
      date published: 2019-03-05
    isrc code: TCAEC1975007
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T13:56:33+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6bc259161b32fb7ad9758943511e42592b5e60788e534bd9998ccf7400d9180f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956826
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956826
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEC1975007
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T19:27:56Z
    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 0x6bc259161b32fb7ad9758943511e42592b5e60788e534bd9998ccf7400d9180f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAEC1975007.
      date published: 2026-07-05T19:27:56Z
    audio: We Are Face2Face
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 132.026
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.774
      additional property: Energy
        type: PropertyValue
        value: 0.908
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.011
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.017
      additional property: Liveness
        type: PropertyValue
        value: 0.077
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.892
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.363
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor