Mc Joker
type: MusicGroup
popularity: 4
followers: 14
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x55af9b370b984af4f6d1ccb8838c3edb23cbd955f0b930f61169cb33723b6d3e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/879b9d32-bea7-4b8d-a5d8-c268b0c65d1f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/879b9d32-bea7-4b8d-a5d8-c268b0c65d1f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/879b9d32-bea7-4b8d-a5d8-c268b0c65d1f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x55af9b370b984af4f6d1ccb8838c3edb23cbd955f0b930f61169cb33723b6d3e","name":"Mc Joker","registered_at":"2026-06-17T13:00:17Z","symbol":"NIM1403093","token_address":"0x2f34eab7e46bce852abf6ad28146939fc9710313","type":"artist","uuid":"879b9d32-bea7-4b8d-a5d8-c268b0c65d1f"}
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 0x55af9b370b984af4f6d1ccb8838c3edb23cbd955f0b930f61169cb33723b6d3e. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/879b9d32-bea7-4b8d-a5d8-c268b0c65d1f.json and https://artists.proofprofile.net/proofs/artist/879b9d32-bea7-4b8d-a5d8-c268b0c65d1f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x55af9b370b984af4f6d1ccb8838c3edb23cbd955f0b930f61169cb33723b6d3e","name":"Mc Joker","registered_at":"2026-06-17T13:00:17Z","symbol":"NIM1403093","token_address":"0x2f34eab7e46bce852abf6ad28146939fc9710313","type":"artist","uuid":"879b9d32-bea7-4b8d-a5d8-c268b0c65d1f"}
album: MLK Vigarista
  type: MusicAlbum
  date published: 2025-03-07
album: Aprende Dividir
  type: MusicAlbum
  date published: 2025-03-22
album: Marolar
  type: MusicAlbum
  date published: 2025-03-23
album: Toda Noite
  type: MusicAlbum
  date published: 2025-03-27
album: Sem Coração
  type: MusicAlbum
  date published: 2025-05-02
  track: Sem Coração
    type: MusicRecording
    duration: PT2M49S
    duration ms: 169846
    explicit: true
    by artist: Mc Joker
    in album: Sem Coração
      type: MusicAlbum
      date published: 2025-05-02
    isrc code: QZNWU2577117
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T12:54:10+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x787edaebe59defa3ff19b60eb6b17df4e355b08444d4509718498f82002ed6ac
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWU2577117
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0x787edaebe59defa3ff19b60eb6b17df4e355b08444d4509718498f82002ed6ac. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWU2577117.
      date published: 2026-07-05T01:12:41Z
    audio: Sem Coração
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 81.157
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.364
      additional property: Energy
        type: PropertyValue
        value: 0.634
      additional property: Speechiness
        type: PropertyValue
        value: 0.236
      additional property: Acousticness
        type: PropertyValue
        value: 0.126
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.283
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.56
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.151
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Quer Saber Como Eu Vivo
  type: MusicAlbum
  date published: 2025-05-15
album: Não da nada
  type: MusicAlbum
  date published: 2025-06-26