MC KF
type: MusicGroup
genre: funk carioca
popularity: 18
followers: 203
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf763864c2bf5a020afb707f744fe05e3e54723ac21e98118cd3301be5087864c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953695
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953695
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/727e2805-925e-4bcc-a4a1-44944234f063.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/727e2805-925e-4bcc-a4a1-44944234f063.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/727e2805-925e-4bcc-a4a1-44944234f063
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T21:42:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf763864c2bf5a020afb707f744fe05e3e54723ac21e98118cd3301be5087864c","name":"MC KF","registered_at":"2026-06-14T16:30:38Z","symbol":"NIM0510810","token_address":"0x03525f4a0b1d3a451dadce646d285ebaddaac1e8","type":"artist","uuid":"727e2805-925e-4bcc-a4a1-44944234f063"}
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 0xf763864c2bf5a020afb707f744fe05e3e54723ac21e98118cd3301be5087864c. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/727e2805-925e-4bcc-a4a1-44944234f063.json and https://artists.proofprofile.net/proofs/artist/727e2805-925e-4bcc-a4a1-44944234f063.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T21:42:01Z
  text: {"copyright_id":"0xf763864c2bf5a020afb707f744fe05e3e54723ac21e98118cd3301be5087864c","name":"MC KF","registered_at":"2026-06-14T16:30:38Z","symbol":"NIM0510810","token_address":"0x03525f4a0b1d3a451dadce646d285ebaddaac1e8","type":"artist","uuid":"727e2805-925e-4bcc-a4a1-44944234f063"}
album: Nostalgia
  type: MusicAlbum
  date published: 2021-10-01
album: Bmlovevolts
  type: MusicAlbum
  date published: 2021-10-06
album: AIN CALICA X TROPA DO MANTÉM
  type: MusicAlbum
  date published: 2022-06-26
  track: AIN CALICA X TROPA DO MANTÉM
    type: MusicRecording
    duration: PT2M56S
    duration ms: 176888
    explicit: true
    by artist: MC KF
    in album: AIN CALICA X TROPA DO MANTÉM
      type: MusicAlbum
      date published: 2022-06-26
    genre: funk carioca
    isrc code: QM3DF2256422
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T13:21:08+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x90e0ce4eca94ab6279e925cd0ea4f9590771b1fc725636af215db528d956e78f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956822
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956822
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2256422
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T18:48:28Z
    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 0x90e0ce4eca94ab6279e925cd0ea4f9590771b1fc725636af215db528d956e78f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM3DF2256422.
      date published: 2026-07-05T18:48:28Z
    audio: AIN CALICA X TROPA DO MANTÉM
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 135.041
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.948
      additional property: Energy
        type: PropertyValue
        value: 0.544
      additional property: Speechiness
        type: PropertyValue
        value: 0.34
      additional property: Acousticness
        type: PropertyValue
        value: 0.214
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.081
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.837
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.991
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
track: Calma BB ta nos melhores amigos x Tropa do mantem
  type: MusicRecording
  duration: PT2M12S
  duration ms: 132852
  explicit: false
  by artist: DJ 2L de Vila Velha
  by artist: DJ KN DE VILA VELHA
  by artist: MC KF
  in album: Calma BB ta nos melhores amigos x Tropa do mantem
    type: MusicAlbum
    date published: 2022-01-10
  genre: funk-carioca
  isrc code: US3DF2201053
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-06T17:25:52+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb48e81a9fc25c3daee93ea012549a9b4c1af683e394c32995be913d5693273cf
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 953515
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/953515
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2201053
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-06-13T12:53:06Z
  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 0xb48e81a9fc25c3daee93ea012549a9b4c1af683e394c32995be913d5693273cf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3DF2201053.
    date published: 2026-06-13T12:53:06Z
  audio: Calma BB ta nos melhores amigos x Tropa do mantem
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 139.761
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.84
    additional property: Energy
      type: PropertyValue
      value: 0.949
    additional property: Speechiness
      type: PropertyValue
      value: 0.189
    additional property: Acousticness
      type: PropertyValue
      value: 0.143
    additional property: Instrumentalness
    additional property: Liveness
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.094

Valence (Positivity)
type: PropertyValue
value: 0.738

Loudness (dB)
type: PropertyValue
value: -3.675

Key Name
type: PropertyValue
value: E

Mode Name
type: PropertyValue
value: Minor