hdhd
type: MusicGroup
genre: breakcore
popularity: 5
followers: 80
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd09589dca944d1e68643b469ebaa8d5a913eb11fe4dec491572e68d85f500f39
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954062
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954062
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/474c2e1c-dee4-47d3-8daa-1e923acb2b62.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/474c2e1c-dee4-47d3-8daa-1e923acb2b62.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/474c2e1c-dee4-47d3-8daa-1e923acb2b62
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T07:39:10Z
additional property: OTSCanonicalRecord
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 0xd09589dca944d1e68643b469ebaa8d5a913eb11fe4dec491572e68d85f500f39. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/474c2e1c-dee4-47d3-8daa-1e923acb2b62.json and https://artists.proofprofile.net/proofs/artist/474c2e1c-dee4-47d3-8daa-1e923acb2b62.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
album: kill yourself
  type: MusicAlbum
  date published: 2023-04-30
album: world is cruel
  type: MusicAlbum
  date published: 2023-06-17
album: feelings come and go
  type: MusicAlbum
  date published: 2023-07-07
album: my smiling face is just a mask of emptiness
  type: MusicAlbum
  date published: 2023-08-18
album: first class
  type: MusicAlbum
  date published: 2023-10-02
  track: first class
    type: MusicRecording
    duration: PT2M57S
    duration ms: 177333
    explicit: false
    by artist: hdhd
    in album: first class
      type: MusicAlbum
      date published: 2023-10-02
    genre: breakcore
    isrc code: QZTB42398039
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T05:34:38+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd019bf654686f5a1f49e70c95c2f255ad520967d02c201736675f3d5b95a2f46
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956474
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956474
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB42398039
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T08:56:35Z
    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 0xd019bf654686f5a1f49e70c95c2f255ad520967d02c201736675f3d5b95a2f46. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB42398039.
      date published: 2026-07-03T08:56:35Z
    audio: first class
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 89.98
      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: 0.734
      additional property: Energy
        type: PropertyValue
        value: 0.617
      additional property: Speechiness
        type: PropertyValue
        value: 0.037
      additional property: Acousticness
        type: PropertyValue
        value: 0.806
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.914
      additional property: Liveness
        type: PropertyValue
        value: 0.14
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.543
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.868
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: everything to me
  type: MusicAlbum
  date published: 2024-01-12