John Klass
type: MusicGroup
description: John Klass (born 1970, in Singapore) is a singer/producer/songwriter/radio presenter. Career Klass was the singer of the group Kick!, along with keyboardist Dinesh Bhatia and guitarist Jai. The gro
popularity: 6
followers: 301
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcfe6457f109b8702bbb003517246ad93a7031f3f02ad8243577d838f02209e0c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954035
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954035
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3cb3438f-0c45-49aa-879f-d53a11032d65.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3cb3438f-0c45-49aa-879f-d53a11032d65.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3cb3438f-0c45-49aa-879f-d53a11032d65
additional property: OTSTimestamp
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  value: 2026-06-17T02:39:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcfe6457f109b8702bbb003517246ad93a7031f3f02ad8243577d838f02209e0c","name":"John Klass","registered_at":"2026-06-16T10:42:00Z","symbol":"NIM1026673","token_address":"0xbbe040cb3e347f271d379e7a224849f2db8b7645","type":"artist","uuid":"3cb3438f-0c45-49aa-879f-d53a11032d65"}
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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe6457f109b8702bbb003517246ad93a7031f3f02ad8243577d838f02209e0c. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cb3438f-0c45-49aa-879f-d53a11032d65.json and https://artists.proofprofile.net/proofs/artist/3cb3438f-0c45-49aa-879f-d53a11032d65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T02:39:28Z
  text: {"copyright_id":"0xcfe6457f109b8702bbb003517246ad93a7031f3f02ad8243577d838f02209e0c","name":"John Klass","registered_at":"2026-06-16T10:42:00Z","symbol":"NIM1026673","token_address":"0xbbe040cb3e347f271d379e7a224849f2db8b7645","type":"artist","uuid":"3cb3438f-0c45-49aa-879f-d53a11032d65"}
album: Jinkli Nona
  type: MusicAlbum
  date published: 2008-06-27
album: The Best of John Klass
  type: MusicAlbum
  date published: 2008-06-27
album: I Just Fall In Love Again
  type: MusicAlbum
  date published: 2021-02-26
album: Jane
  type: MusicAlbum
  date published: 2021-07-23
album: Love Songs
  type: MusicAlbum
  date published: 2021-10-29
album: Christmas In My Mind (Reissue)
  type: MusicAlbum
  date published: 2023-11-24
album: Erased
  type: MusicAlbum
  date published: 2024-08-22
album: Jazz Bar
  type: MusicAlbum
  date published: 2024-09-05
album: Erased (2024 Remastered Version)
  type: MusicAlbum
  date published: 2024-09-06
album: John Klass
  type: MusicAlbum
  date published: 2024-09-19
  track: Jazz Bar
    type: MusicRecording
    duration: PT3M42S
    duration ms: 222746
    explicit: false
    by artist: John Klass
    in album: John Klass
      type: MusicAlbum
      date published: 2024-09-19
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    additional property: CopyrightStatus
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    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957880
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIO2444910
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-13T16:39:18Z
    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 0x97fe261724e891519762f4cc1e375f903a0f77eb2be6810fba89d5006425baa3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAIO2444910.
      date published: 2026-07-13T16:39:18Z
    audio: Jazz Bar
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 106.977
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.733
      additional property: Energy
        type: PropertyValue
        value: 0.552
      additional property: Speechiness
        type: PropertyValue
        value: 0.032
      additional property: Acousticness
        type: PropertyValue
        value: 0.068
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.113
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.798
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.401
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Klass
  type: MusicAlbum
  date published: 2025-03-22