Dj Kem's
type: MusicGroup
genre: raï
popularity: 13
followers: 1032
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb5aee744d4b9a83a34cd447494e652d19c8907096a4ca1c8fe342b072384ba64
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953819
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953819
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fd928cdd-395e-4427-9a0d-f03dc264a828.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fd928cdd-395e-4427-9a0d-f03dc264a828.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fd928cdd-395e-4427-9a0d-f03dc264a828
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T18:31:52Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb5aee744d4b9a83a34cd447494e652d19c8907096a4ca1c8fe342b072384ba64","name":"Dj Kem's","registered_at":"2026-06-15T07:09:13Z","symbol":"NIM0720491","token_address":"0xa40032a985457b86bcfdc468dcf4efcb3652a6fe","type":"artist","uuid":"fd928cdd-395e-4427-9a0d-f03dc264a828"}
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 0xb5aee744d4b9a83a34cd447494e652d19c8907096a4ca1c8fe342b072384ba64. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd928cdd-395e-4427-9a0d-f03dc264a828.json and https://artists.proofprofile.net/proofs/artist/fd928cdd-395e-4427-9a0d-f03dc264a828.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T18:31:52Z
  text: {"copyright_id":"0xb5aee744d4b9a83a34cd447494e652d19c8907096a4ca1c8fe342b072384ba64","name":"Dj Kem's","registered_at":"2026-06-15T07:09:13Z","symbol":"NIM0720491","token_address":"0xa40032a985457b86bcfdc468dcf4efcb3652a6fe","type":"artist","uuid":"fd928cdd-395e-4427-9a0d-f03dc264a828"}
album: Had Chira
  type: MusicAlbum
  date published: 2020-08-11
album: Ya Ferfara (Remix)
  type: MusicAlbum
  date published: 2020-11-11
  track: Ya Ferfara (Remix)
    type: MusicRecording
    duration: PT3M27S
    duration ms: 207040
    explicit: true
    by artist: Dj Kem's
    in album: Ya Ferfara (Remix)
      type: MusicAlbum
      date published: 2020-11-11
    genre: raï
    isrc code: TCAFF2017920
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-11T14:35:55+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x23ceb9df9b717ea0e85413f7ccc657da3a9cc507167cda235ab300a4d3c1c36a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957583
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957583
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFF2017920
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-11T15:53:17Z
    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 0x23ceb9df9b717ea0e85413f7ccc657da3a9cc507167cda235ab300a4d3c1c36a. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/TCAFF2017920.
      date published: 2026-07-11T15:53:17Z
    audio: Ya Ferfara (Remix)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 119.996
      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: 0.723
      additional property: Energy
        type: PropertyValue
        value: 0.914
      additional property: Speechiness
        type: PropertyValue
        value: 0.062
      additional property: Acousticness
        type: PropertyValue
        value: 0.111
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.166
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.763
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.071
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Sef Seyf
  type: MusicAlbum
  date published: 2021-07-31
album: On s’taille au Bled
  type: MusicAlbum
  date published: 2021-08-18
album: Chaoui Gang
  type: MusicAlbum
  date published: 2022-06-01
album: Aaroussa Chaouia
  type: MusicAlbum
  date published: 2022-12-07