Jojin Taka
type: MusicGroup
genre: boom bap
popularity: 18
followers: 66
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdb21f698c78eff3a3d71a08a107cce076ef14905198e606f1a6c48b4b9a67819
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953772
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953772
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c6a2dc3b-4b82-497e-ba58-42dad7c88863.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c6a2dc3b-4b82-497e-ba58-42dad7c88863.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c6a2dc3b-4b82-497e-ba58-42dad7c88863
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T10:33:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdb21f698c78eff3a3d71a08a107cce076ef14905198e606f1a6c48b4b9a67819","name":"Jojin Taka","registered_at":"2026-06-15T01:23:43Z","symbol":"NIM0638000","token_address":"0xd4d7fd020895d1fca8e373fcadfceb974122b1e3","type":"artist","uuid":"c6a2dc3b-4b82-497e-ba58-42dad7c88863"}
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 0xdb21f698c78eff3a3d71a08a107cce076ef14905198e606f1a6c48b4b9a67819. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6a2dc3b-4b82-497e-ba58-42dad7c88863.json and https://artists.proofprofile.net/proofs/artist/c6a2dc3b-4b82-497e-ba58-42dad7c88863.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T10:33:29Z
  text: {"copyright_id":"0xdb21f698c78eff3a3d71a08a107cce076ef14905198e606f1a6c48b4b9a67819","name":"Jojin Taka","registered_at":"2026-06-15T01:23:43Z","symbol":"NIM0638000","token_address":"0xd4d7fd020895d1fca8e373fcadfceb974122b1e3","type":"artist","uuid":"c6a2dc3b-4b82-497e-ba58-42dad7c88863"}
album: Rocket Man
  type: MusicAlbum
  date published: 2018-07-26
album: Change
  type: MusicAlbum
  date published: 2020-01-30
album: Hopecore
  type: MusicAlbum
  date published: 2022-12-21
  track: Hopecore
    type: MusicRecording
    duration: PT1M18S
    duration ms: 78901
    explicit: false
    by artist: Jojin Taka
    in album: Hopecore
      type: MusicAlbum
      date published: 2022-12-21
    genre: boom bap
    isrc code: QZNWS2325185
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T11:32:35+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x308a213ba5c22c6b6935894c839a8de83c67875099bf85fec1b4274fb5f319d1
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958407
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958407
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2325185
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T12:08:48Z
    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 0x308a213ba5c22c6b6935894c839a8de83c67875099bf85fec1b4274fb5f319d1. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZNWS2325185.
      date published: 2026-07-17T12:08:48Z
    audio: Hopecore
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 120.629
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.622
      additional property: Energy
        type: PropertyValue
        value: 0.346
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.98
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.937
      additional property: Liveness
        type: PropertyValue
        value: 0.11
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.217
      additional property: Loudness (dB)
        type: PropertyValue
        value: -14.218
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: you will fight knowing that you cannot win
  type: MusicAlbum
  date published: 2024-12-08
album: Change
  type: MusicAlbum
  date published: 2025-08-11