Hai Ku
type: MusicGroup
popularity: 5
followers: 919
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbbc9b75bb0190dd578ccc3ee3b5389a8c4a8146f0ba63f79bdc7d8c09b6b927b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a5d73037-b048-44ef-a3c1-39b11d94d8ca.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a5d73037-b048-44ef-a3c1-39b11d94d8ca.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a5d73037-b048-44ef-a3c1-39b11d94d8ca
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xbbc9b75bb0190dd578ccc3ee3b5389a8c4a8146f0ba63f79bdc7d8c09b6b927b","name":"Hai Ku","registered_at":"2026-06-20T07:28:36Z","symbol":"NIM1554578","token_address":"0x0522d756c049a701a4ff938fe051e586716ff799","type":"artist","uuid":"a5d73037-b048-44ef-a3c1-39b11d94d8ca"}
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 0xbbc9b75bb0190dd578ccc3ee3b5389a8c4a8146f0ba63f79bdc7d8c09b6b927b. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5d73037-b048-44ef-a3c1-39b11d94d8ca.json and https://artists.proofprofile.net/proofs/artist/a5d73037-b048-44ef-a3c1-39b11d94d8ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0xbbc9b75bb0190dd578ccc3ee3b5389a8c4a8146f0ba63f79bdc7d8c09b6b927b","name":"Hai Ku","registered_at":"2026-06-20T07:28:36Z","symbol":"NIM1554578","token_address":"0x0522d756c049a701a4ff938fe051e586716ff799","type":"artist","uuid":"a5d73037-b048-44ef-a3c1-39b11d94d8ca"}
album: Strawberry Face
  type: MusicAlbum
  date published: 2020-12-18
  track: Cavewoman
    type: MusicRecording
    duration: PT4M0S
    duration ms: 240743
    explicit: false
    by artist: Hai Ku
    in album: Strawberry Face
      type: MusicAlbum
      date published: 2020-12-18
    isrc code: QZNWZ2033638
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T01:39:49+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd90ba2a825e598fcbb2f8deec33c3f57b1318ac65cb31713233d00c0670bcd23
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956859
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956859
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2033638
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:42:12Z
    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 0xd90ba2a825e598fcbb2f8deec33c3f57b1318ac65cb31713233d00c0670bcd23. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZNWZ2033638.
      date published: 2026-07-06T01:42:12Z
    audio: Cavewoman
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 141.927
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.366
      additional property: Energy
        type: PropertyValue
        value: 0.064
      additional property: Speechiness
        type: PropertyValue
        value: 0.045
      additional property: Acousticness
        type: PropertyValue
        value: 0.961
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.003
      additional property: Liveness
        type: PropertyValue
        value: 0.077
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.225
      additional property: Loudness (dB)
        type: PropertyValue
        value: -22.053
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Purebred
  type: MusicAlbum
  date published: 2020-12-26
album: All I've Had
  type: MusicAlbum
  date published: 2021-01-15
album: There Are Things That I Could Say
  type: MusicAlbum
  date published: 2021-07-10
album: Purebred
  type: MusicAlbum
  date published: 2021-10-05
album: Hai Ku: The Demos
  type: MusicAlbum
  date published: 2023-02-14
album: Silverfish
  type: MusicAlbum
  date published: 2024-03-22