21 Hertz
type: MusicGroup
genre: downtempo
genre: trip hop
popularity: 29
followers: 5331
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6f7bbd3d7850d1fd5f1113288398abcfc08e0b4b07ac355c678785133c1c0bdd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/01b98765-cc52-4cff-af8e-9047112dc0aa.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/01b98765-cc52-4cff-af8e-9047112dc0aa.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/01b98765-cc52-4cff-af8e-9047112dc0aa
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6f7bbd3d7850d1fd5f1113288398abcfc08e0b4b07ac355c678785133c1c0bdd","name":"21 Hertz","registered_at":"2026-06-12T14:57:12Z","symbol":"NIM0002962","token_address":"0xd8644a205f586f2e30fcbed926a0ce48f6dff398","type":"artist","uuid":"01b98765-cc52-4cff-af8e-9047112dc0aa"}
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 0x6f7bbd3d7850d1fd5f1113288398abcfc08e0b4b07ac355c678785133c1c0bdd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01b98765-cc52-4cff-af8e-9047112dc0aa.json and https://artists.proofprofile.net/proofs/artist/01b98765-cc52-4cff-af8e-9047112dc0aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x6f7bbd3d7850d1fd5f1113288398abcfc08e0b4b07ac355c678785133c1c0bdd","name":"21 Hertz","registered_at":"2026-06-12T14:57:12Z","symbol":"NIM0002962","token_address":"0xd8644a205f586f2e30fcbed926a0ce48f6dff398","type":"artist","uuid":"01b98765-cc52-4cff-af8e-9047112dc0aa"}
album: Ocean Of Time
  type: MusicAlbum
  date published: 2005-09-30
  track: Ever
    type: MusicRecording
    duration: PT4M31S
    duration ms: 271386
    explicit: false
    by artist: 21 Hertz
    in album: Ocean Of Time
      type: MusicAlbum
      date published: 2005-09-30
    popularity: 30
    isrc code: SEWIT0500104
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-06T20:53:06+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2786506b61d9c2f793915d7cc2bd96344ef73a686aa5381a0bb8e94280d34046
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 953515
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/953515
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWIT0500104
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-06-13T12:53:06Z
    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 0x2786506b61d9c2f793915d7cc2bd96344ef73a686aa5381a0bb8e94280d34046. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEWIT0500104.
      date published: 2026-06-13T12:53:06Z
    audio: Ever
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 138.457
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.491
      additional property: Energy
        type: PropertyValue
        value: 0.416
      additional property: Speechiness
        type: PropertyValue
        value: 0.032
      additional property: Acousticness
        type: PropertyValue
        value: 0.008
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.008
      additional property: Liveness
        type: PropertyValue
        value: 0.135
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.108
      additional property: Loudness (dB)
        type: PropertyValue
        value: -15.421
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major