Klein Four
type: MusicGroup
popularity: 3
followers: 565
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4014a5d12d86baa3cf5dca340498c96ce64b16dd86d130f2587eda959f73fadb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954058
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954058
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/44efc99c-123b-455a-b2b5-c3f88ddc147b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/44efc99c-123b-455a-b2b5-c3f88ddc147b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/44efc99c-123b-455a-b2b5-c3f88ddc147b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T06:34:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4014a5d12d86baa3cf5dca340498c96ce64b16dd86d130f2587eda959f73fadb","name":"Klein Four","registered_at":"2026-06-16T13:36:54Z","symbol":"NIM1068386","token_address":"0x6af13d42880ab828b709e382b700344c8fd2de57","type":"artist","uuid":"44efc99c-123b-455a-b2b5-c3f88ddc147b"}
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 0x4014a5d12d86baa3cf5dca340498c96ce64b16dd86d130f2587eda959f73fadb. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44efc99c-123b-455a-b2b5-c3f88ddc147b.json and https://artists.proofprofile.net/proofs/artist/44efc99c-123b-455a-b2b5-c3f88ddc147b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T06:34:31Z
  text: {"copyright_id":"0x4014a5d12d86baa3cf5dca340498c96ce64b16dd86d130f2587eda959f73fadb","name":"Klein Four","registered_at":"2026-06-16T13:36:54Z","symbol":"NIM1068386","token_address":"0x6af13d42880ab828b709e382b700344c8fd2de57","type":"artist","uuid":"44efc99c-123b-455a-b2b5-c3f88ddc147b"}
album: Musical Fruitcake
  type: MusicAlbum
  date published: 2005-01-01
  track: Finite Simple Group (of Order Two)
    type: MusicRecording
    duration: PT3M0S
    duration ms: 180066
    explicit: false
    by artist: Klein Four
    in album: Musical Fruitcake
      type: MusicAlbum
      date published: 2005-01-01
    isrc code: USCGH0534468
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T15:13:55+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x078eb0aacce0e387e7e46fbfbc7a2b8283adca5c0c0955a3b747f1e6097d11aa
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956826
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956826
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH0534468
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T19:27:56Z
    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 0x078eb0aacce0e387e7e46fbfbc7a2b8283adca5c0c0955a3b747f1e6097d11aa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH0534468.
      date published: 2026-07-05T19:27:56Z
    audio: Finite Simple Group (of Order Two)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 100.277
      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: 0.521
      additional property: Energy
        type: PropertyValue
        value: 0.344
      additional property: Speechiness
        type: PropertyValue
        value: 0.243
      additional property: Acousticness
        type: PropertyValue
        value: 0.864
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.147
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.587
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.795
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Major