Extra Curricular
type: MusicGroup
genre: liquid funk
description: Extra Curricular are a future soul band from Huddersfield, England. Their members are Thabo Mkwananzi (born 3 August 1981), Jack Button (born 9 February 1987), Noah Burton (born 7 November 1986), Gre
popularity: 7
followers: 453
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xeb4d92481376aa48b5474edcdbf0e669d0d94c1a334354a7710900cb259248ce
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/53fa59af-eede-4a3e-a02d-872497c98357.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/53fa59af-eede-4a3e-a02d-872497c98357.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/53fa59af-eede-4a3e-a02d-872497c98357
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xeb4d92481376aa48b5474edcdbf0e669d0d94c1a334354a7710900cb259248ce","name":"Extra Curricular","registered_at":"2026-06-16T19:10:02Z","symbol":"NIM1147878","token_address":"0xe69e37725e8f0520cbeb3adbd61028113138bb57","type":"artist","uuid":"53fa59af-eede-4a3e-a02d-872497c98357"}
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 0xeb4d92481376aa48b5474edcdbf0e669d0d94c1a334354a7710900cb259248ce. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53fa59af-eede-4a3e-a02d-872497c98357.json and https://artists.proofprofile.net/proofs/artist/53fa59af-eede-4a3e-a02d-872497c98357.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xeb4d92481376aa48b5474edcdbf0e669d0d94c1a334354a7710900cb259248ce","name":"Extra Curricular","registered_at":"2026-06-16T19:10:02Z","symbol":"NIM1147878","token_address":"0xe69e37725e8f0520cbeb3adbd61028113138bb57","type":"artist","uuid":"53fa59af-eede-4a3e-a02d-872497c98357"}
album: Groove Me / Shotgun
  type: MusicAlbum
  date published: 1989-04-04
album: Won't Stay Down
  type: MusicAlbum
  date published: 2012-06-18
album: Last Day
  type: MusicAlbum
  date published: 2012-07-23
  track: Last Day - SpectraSoul Vocal Mix
    type: MusicRecording
    duration: PT5M51S
    duration ms: 351979
    explicit: false
    by artist: Extra Curricular
    in album: Last Day
      type: MusicAlbum
      date published: 2012-07-23
    genre: liquid funk
    isrc code: GBEFR1208164
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T11:30:22+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xc51148dc48e14cc30860d31164cd49819d6da7d20b32cec68b89374e5287b62e
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958543
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958543
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEFR1208164
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T11:58:44Z
    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 0xc51148dc48e14cc30860d31164cd49819d6da7d20b32cec68b89374e5287b62e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBEFR1208164.
      date published: 2026-07-18T11:58:44Z
    audio: Last Day - SpectraSoul Vocal Mix
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 84.993
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.607
      additional property: Energy
        type: PropertyValue
        value: 0.862
      additional property: Speechiness
        type: PropertyValue
        value: 0.049
      additional property: Acousticness
        type: PropertyValue
        value: 0.001
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.122
      additional property: Liveness
        type: PropertyValue
        value: 0.105
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.404
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.74
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Notify (feat. Thabo)
  type: MusicAlbum
  date published: 2013-07-04