Hardsoul
type: MusicGroup
description: Hardsoul is a duo of house music producers and DJs from the Netherlands, made up of the brothers Rogier (DJ Roog) and Greg van Bueren. Biography Founded in 1997, Hardsoul began releasing music on Sou
popularity: 15
followers: 39
additional property: CopyrightID
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additional property: OTSCanonicalRecord
additional property: OTSVerifyInstructions
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  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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01740b72b470326fe62612e8651be16dbc5ce3ce5a00e4e2c2f9bf6cf7cd2a00. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/607fc2f9-9223-43a6-9657-73e8db53a282.json and https://artists.proofprofile.net/proofs/artist/607fc2f9-9223-43a6-9657-73e8db53a282.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T22:00:24Z
album: Do What I Gotta Do
  type: MusicAlbum
  date published: 1998-07-01
album: Where Did Our Love Go
  type: MusicAlbum
  date published: 2001-07-01
album: Back Together (feat. Ron Carroll)
  type: MusicAlbum
  date published: 2003-08-29
  track: Back Together (feat. Ron Carroll) - Copyright Dub Mix
    type: MusicRecording
    duration: PT7M18S
    duration ms: 438320
    explicit: false
    by artist: Hardsoul
    in album: Back Together (feat. Ron Carroll)
      type: MusicAlbum
      date published: 2003-08-29
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
      type: PropertyValue
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    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 0x41a8a5084eb9c0d4a7e7cf0c0aba67b5f9885ad345053c3da05c844fc68860fc. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GBCPZ0401005.
      date published: 2026-07-14T22:55:31Z
    audio: Back Together (feat. Ron Carroll) - Copyright Dub Mix
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 120.967
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.74
      additional property: Energy
        type: PropertyValue
        value: 0.874
      additional property: Speechiness
        type: PropertyValue
        value: 0.078
      additional property: Acousticness
        type: PropertyValue
        value: 0.064
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
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        value: 0.671
      additional property: Valence (Positivity)
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        value: 0.761
      additional property: Loudness (dB)
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        value: -4.622
      additional property: Key Name
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        value: A
      additional property: Mode Name
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album: Back Together (feat. Ron Carroll) [Remixes]
  type: MusicAlbum
  date published: 2019-08-09