Harde Kwark
type: MusicGroup
genre: hardcore
genre: hardstyle
popularity: 34
followers: 3429
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa6739ccc405024e608619fa6299ecb11ad56b1aa9aaa06aed74ef3fed9dc76d6
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/49d7d2cc-b192-45fc-80be-ba53905108be.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/49d7d2cc-b192-45fc-80be-ba53905108be.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/49d7d2cc-b192-45fc-80be-ba53905108be
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa6739ccc405024e608619fa6299ecb11ad56b1aa9aaa06aed74ef3fed9dc76d6","name":"Harde Kwark","registered_at":"2026-06-11T19:10:41Z","symbol":"NIM0095885","token_address":"0x778461eb1e614dbc76bb0ad216cc5aee9d6ff65c","type":"artist","uuid":"49d7d2cc-b192-45fc-80be-ba53905108be"}
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 0xa6739ccc405024e608619fa6299ecb11ad56b1aa9aaa06aed74ef3fed9dc76d6. 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/49d7d2cc-b192-45fc-80be-ba53905108be.json and https://artists.proofprofile.net/proofs/artist/49d7d2cc-b192-45fc-80be-ba53905108be.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xa6739ccc405024e608619fa6299ecb11ad56b1aa9aaa06aed74ef3fed9dc76d6","name":"Harde Kwark","registered_at":"2026-06-11T19:10:41Z","symbol":"NIM0095885","token_address":"0x778461eb1e614dbc76bb0ad216cc5aee9d6ff65c","type":"artist","uuid":"49d7d2cc-b192-45fc-80be-ba53905108be"}
album: The Superpowers
  type: MusicAlbum
  date published: 2023-08-03
album: Ignited Flame
  type: MusicAlbum
  date published: 2023-08-08
album: The Afterlife
  type: MusicAlbum
  date published: 2023-08-21
album: The Afterlife
  type: MusicAlbum
  date published: 2023-08-24
album: Unlock Your Mind.
  type: MusicAlbum
  date published: 2023-09-06
album: See me
  type: MusicAlbum
  date published: 2023-09-14
album: DISAPPEAR.
  type: MusicAlbum
  date published: 2023-10-27
album: LIKE THAT
  type: MusicAlbum
  date published: 2023-12-14
  track: LIKE THAT
    type: MusicRecording
    duration: PT2M45S
    duration ms: 165593
    explicit: false
    by artist: Harde Kwark
    in album: LIKE THAT
      type: MusicAlbum
      date published: 2023-12-14
    genre: hardcore
    genre: hardstyle
    isrc code: QZWFM2398972
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-12T19:38:31+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x89dd7b566e76097eeb80a3db07df2cc01ad1444a9ccd6a2f0d51a82cf9d4a77c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957750
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957750
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFM2398972
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-12T20:39:38Z
    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 0x89dd7b566e76097eeb80a3db07df2cc01ad1444a9ccd6a2f0d51a82cf9d4a77c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZWFM2398972.
      date published: 2026-07-12T20:39:38Z
    audio: LIKE THAT
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 160.178
      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: 0.783
      additional property: Energy
        type: PropertyValue
        value: 0.912
      additional property: Speechiness
        type: PropertyValue
        value: 0.22
      additional property: Acousticness
        type: PropertyValue
        value: 0.013
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.081
      additional property: Liveness
        type: PropertyValue
        value: 0.068
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.114
      additional property: Loudness (dB)
        type: PropertyValue
        value: -0.72
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: GAME OVER
  type: MusicAlbum
  date published: 2024-01-11
album: HAPPY NATION
  type: MusicAlbum
  date published: 2024-02-01
album: Down Like Mine
  type: MusicAlbum
  date published: 2024-03-14
album: Alive
  type: MusicAlbum
  date published: 2024-04-04
album: Dreamin'
  type: MusicAlbum
  date published: 2024-05-10
album: TOXIC
  type: MusicAlbum
  date published: 2024-06-07
  track: TOXIC
    type: MusicRecording
    duration: PT3M26S
    duration ms: 206281
    explicit: true
    by artist: Harde Kwark
    in album: TOXIC
      type: MusicAlbum
      date published: 2024-06-07
    genre: hardcore
    genre: hardstyle
    isrc code: QZNWR2471604
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-14T22:10:36+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x022e54f4b2ee3077dc0586263641e55ad30ff5195a168f4f03513cf6d2646386
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958074
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958074
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2471604
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-14T22:45:25Z
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: TOXIC
album: I NEED YOU
album: WARZONE
album: TAKE CONTROL
album: FLYING HIGH
album: CAN'T STOP US
album: LIKE A DREAM
album: I LOVED U
album: SHIVERS
album: ELEVATION
album: I WANNA DANCE
album: PROMISE YOU

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022e54f4b2ee3077dc0586263641e55ad30ff5195a168f4f03513cf6d2646386. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNWR2471604.
date published: 2026-07-14T22:45:25Z

TOXIC
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 160.067
additional property: Musical Key
  type: PropertyValue
  value: 8
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.711
additional property: Energy
  type: PropertyValue
  value: 0.821
additional property: Speechiness
  type: PropertyValue
  value: 0.127
additional property: Acousticness
  type: PropertyValue
  value: 0.023
additional property: Instrumentalness
  type: PropertyValue
  value: 0.534
additional property: Liveness
  type: PropertyValue
  value: 0.185
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.354
additional property: Loudness (dB)
  type: PropertyValue
  value: -10.114
additional property: Key Name
  type: PropertyValue
  value: Ab
additional property: Mode Name
  type: PropertyValue
  value: Minor

I NEED YOU
type: MusicAlbum
date published: 2024-08-09

WARZONE
type: MusicAlbum
date published: 2024-10-04

TAKE CONTROL
type: MusicAlbum
date published: 2024-12-06

FLYING HIGH
type: MusicAlbum
date published: 2025-02-14

CAN'T STOP US
type: MusicAlbum
date published: 2025-03-28

LIKE A DREAM
type: MusicAlbum
date published: 2025-05-02

I LOVED U
type: MusicAlbum
date published: 2025-05-23

SHIVERS
type: MusicAlbum
date published: 2025-06-27

ELEVATION
type: MusicAlbum
date published: 2025-08-22

I WANNA DANCE
type: MusicAlbum
date published: 2025-10-09

PROMISE YOU
type: MusicAlbum
date published: 2025-11-07