Du Marthaz
type: MusicGroup
genre: kizomba
genre: zouk
popularity: 7
followers: 2038
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7931687dc88d80ce0852414ee351a31383d4f199e15b931bd54ea0fd77a9cc1d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954650
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954650
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/da0d8f2e-d210-4674-9a0c-e9031e64adc0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/da0d8f2e-d210-4674-9a0c-e9031e64adc0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/da0d8f2e-d210-4674-9a0c-e9031e64adc0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:51:12Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7931687dc88d80ce0852414ee351a31383d4f199e15b931bd54ea0fd77a9cc1d","name":"Du Marthaz","registered_at":"2026-06-21T04:19:30Z","symbol":"NIM1817736","token_address":"0x144505c3aa502f491a416e2679bea042d1430003","type":"artist","uuid":"da0d8f2e-d210-4674-9a0c-e9031e64adc0"}
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 0x7931687dc88d80ce0852414ee351a31383d4f199e15b931bd54ea0fd77a9cc1d. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da0d8f2e-d210-4674-9a0c-e9031e64adc0.json and https://artists.proofprofile.net/proofs/artist/da0d8f2e-d210-4674-9a0c-e9031e64adc0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T04:51:12Z
  text: {"copyright_id":"0x7931687dc88d80ce0852414ee351a31383d4f199e15b931bd54ea0fd77a9cc1d","name":"Du Marthaz","registered_at":"2026-06-21T04:19:30Z","symbol":"NIM1817736","token_address":"0x144505c3aa502f491a416e2679bea042d1430003","type":"artist","uuid":"da0d8f2e-d210-4674-9a0c-e9031e64adc0"}
album: Apaixonado
  type: MusicAlbum
  date published: 2016-06-11
album: Nha Dor Di Kabesa (feat. Caci Carvalho)
  type: MusicAlbum
  date published: 2017-03-24
album: Nkré Pou Anel
  type: MusicAlbum
  date published: 2019-12-19
album: Nha Doce Mel
  type: MusicAlbum
  date published: 2020-08-10
album: Da Valor
  type: MusicAlbum
  date published: 2020-12-25
album: Di Alma
  type: MusicAlbum
  date published: 2021-02-26
album: Kanga Ku Bo
  type: MusicAlbum
  date published: 2021-07-23
  track: Kanga Ku Bo
    type: MusicRecording
    duration: PT3M43S
    duration ms: 223348
    explicit: false
    by artist: Du Marthaz
    in album: Kanga Ku Bo
      type: MusicAlbum
      date published: 2021-07-23
    genre: kizomba
    genre: zouk
    isrc code: USHM92115416
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T08:47:08+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xbe0b575b6a58a9f3edd1c0d603b30e1aba7ac3f36e9d170dad13d828f8b667d1
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958987
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958987
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92115416
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T09:04:56Z
    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 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 0xbe0b575b6a58a9f3edd1c0d603b30e1aba7ac3f36e9d170dad13d828f8b667d1. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USHM92115416.
      date published: 2026-07-21T09:04:56Z
    audio: Kanga Ku Bo
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 114.98
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.811
      additional property: Energy
        type: PropertyValue
        value: 0.809
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.095
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.068
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.963
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.925
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: N Apaixona Pa Bo
  type: MusicAlbum
  date published: 2022-02-22
album: Nha Dor De Kabesa
  type: MusicAlbum
  date published: 2022-06-01
album: Nha Dor
  type: MusicAlbum
  date published: 2022-06-10
album: Kanga ku Bo (Mellodramatic Remix)
  type: MusicAlbum
  date published: 2022-07-01
album: Panhan Bedju
  type: MusicAlbum
  date published: 2022-08-04
album: Nhaku Pikena
  type: MusicAlbum
  date published: 2022-11-02
album: Coisa Sab
  type: MusicAlbum
  date published: 2022-12-14
album: Roskinha
  type: MusicAlbum
  date published: 2023-01-04
album: In love
  type: MusicAlbum
  date published: 2023-01-12
album: Nu Assumi
  type: MusicAlbum
  date published: 2023-01-27
album: Nha Doce Mel
  type: MusicAlbum
  date published: 2023-03-30
album: SI N SABIA
  type: MusicAlbum
  date published: 2023-07-11
album: Djam Kreu
  type: MusicAlbum
  date published: 2024-02-19
album: Nos terra
  type: MusicAlbum
  date published: 2024-03-30