Das EFX
type: MusicGroup
genre: east coast hip hop
description: Das EFX is an American hip hop duo. It consists of emcees Dray (also known as Krazy Drayz, born Andre Weston, September 9, 1970) and Skoob (also known as Books and Boogie Bang, born William "Willie
popularity: 4
followers: 675
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x789c81f3d170dddb2d21b70a877253949a622b57c6d79c4b73fef1b0df684ee2
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954516
additional property: OTSProofURL
  type: PropertyValue
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additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a34d3e28-3817-40b9-87b5-9ae2fec7a3fb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a34d3e28-3817-40b9-87b5-9ae2fec7a3fb
additional property: OTSTimestamp
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  value: 2026-06-20T07:04:44Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x789c81f3d170dddb2d21b70a877253949a622b57c6d79c4b73fef1b0df684ee2","name":"Das EFX","registered_at":"2026-06-20T06:13:30Z","symbol":"NIM1540243","token_address":"0xf8aebf79b7865f696a09e229b49eca2cdaef0960","type":"artist","uuid":"a34d3e28-3817-40b9-87b5-9ae2fec7a3fb"}
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 0x789c81f3d170dddb2d21b70a877253949a622b57c6d79c4b73fef1b0df684ee2. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a34d3e28-3817-40b9-87b5-9ae2fec7a3fb.json and https://artists.proofprofile.net/proofs/artist/a34d3e28-3817-40b9-87b5-9ae2fec7a3fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T07:04:44Z
  text: {"copyright_id":"0x789c81f3d170dddb2d21b70a877253949a622b57c6d79c4b73fef1b0df684ee2","name":"Das EFX","registered_at":"2026-06-20T06:13:30Z","symbol":"NIM1540243","token_address":"0xf8aebf79b7865f696a09e229b49eca2cdaef0960","type":"artist","uuid":"a34d3e28-3817-40b9-87b5-9ae2fec7a3fb"}
album: How We Do
  type: MusicAlbum
  date published: 2003-08-05
  track: Jungle
    type: MusicRecording
    duration: PT5M18S
    duration ms: 318587
    explicit: true
    by artist: Das EFX
    in album: How We Do
      type: MusicAlbum
      date published: 2003-08-05
    genre: east coast hip hop
    isrc code: QM6N21783631
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    additional property: CopyrightStatus
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      value: registered
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6N21783631
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T03:03:40Z
    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 0xe844f7cd079aa7c3f2375e70878b6f094548f0027555bffadbe83c249cd0752c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM6N21783631.
      date published: 2026-07-21T03:03:40Z
    audio: Jungle
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 90.97
      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: 0.728
      additional property: Energy
        type: PropertyValue
        value: 0.764
      additional property: Speechiness
        type: PropertyValue
        value: 0.1
      additional property: Acousticness
        type: PropertyValue
        value: 0.106
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.101
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.687
      additional property: Loudness (dB)
        type: PropertyValue
        value: -3.328
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor