老胡Khufu
type: MusicGroup
genre: chinese hip hop
genre: gufeng
popularity: 3
followers: 103
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x766c2bdcaedc3c9bd1a6c2e4af89525c5917d59bb92ecf56545d54bda6219a2c
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/4abaf4d6-1f31-41de-80e2-51edcab65c1d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4abaf4d6-1f31-41de-80e2-51edcab65c1d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4abaf4d6-1f31-41de-80e2-51edcab65c1d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x766c2bdcaedc3c9bd1a6c2e4af89525c5917d59bb92ecf56545d54bda6219a2c","name":"老胡Khufu","registered_at":"2026-06-16T15:35:12Z","symbol":"NIM1096639","token_address":"0x3f10626cc72ed776ac1f85fc1216f65b32193778","type":"artist","uuid":"4abaf4d6-1f31-41de-80e2-51edcab65c1d"}
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 0x766c2bdcaedc3c9bd1a6c2e4af89525c5917d59bb92ecf56545d54bda6219a2c. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4abaf4d6-1f31-41de-80e2-51edcab65c1d.json and https://artists.proofprofile.net/proofs/artist/4abaf4d6-1f31-41de-80e2-51edcab65c1d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x766c2bdcaedc3c9bd1a6c2e4af89525c5917d59bb92ecf56545d54bda6219a2c","name":"老胡Khufu","registered_at":"2026-06-16T15:35:12Z","symbol":"NIM1096639","token_address":"0x3f10626cc72ed776ac1f85fc1216f65b32193778","type":"artist","uuid":"4abaf4d6-1f31-41de-80e2-51edcab65c1d"}
album: 芊芊
  type: MusicAlbum
  date published: 2022-03-22
  track: 芊芊 - Remix版
    type: MusicRecording
    duration: PT3M4S
    duration ms: 184225
    explicit: false
    by artist: 添儿呗
    by artist: 老胡Khufu
    in album: 芊芊
      type: MusicAlbum
      date published: 2022-03-22
    popularity: 4
    genre: c-pop
    genre: gufeng
    isrc code: HKG731760217
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-31T14:53:25+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8e271d01d3ec82c73b02699acb0addc9d9a965228bcb43167f8acbe00a6f98c3
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 960418
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/960418
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731760217
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-31T15:20:15Z
    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 0x8e271d01d3ec82c73b02699acb0addc9d9a965228bcb43167f8acbe00a6f98c3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKG731760217.
      date published: 2026-07-31T15:20:15Z
    audio: 芊芊 - Remix版
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 146.562
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.626
      additional property: Energy
        type: PropertyValue
        value: 0.678
      additional property: Speechiness
        type: PropertyValue
        value: 0.039
      additional property: Acousticness
        type: PropertyValue
        value: 0.14
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.358
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.581
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.112
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Minor