Lapcat
type: MusicGroup
description: thumb|LAPCAT and LAPCAT II Logos LAPCAT (Long-Term Advanced Propulsion Concepts and Technologies) was a 36-month European FP6 study to examine ways to produce engines for a Mach number 4-8 hypersonic
popularity: 26
followers: 3327
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xd1ed10bba4cbc17214bbd02dae929d8fe6baa897f72b4ec794db1290dbd2ca88
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
  type: PropertyValue
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additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/84ea8d0c-6b30-4859-a6d9-070332e6ba70
additional property: OTSTimestamp
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  value: 2026-06-12T19:24:56Z
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 0xd1ed10bba4cbc17214bbd02dae929d8fe6baa897f72b4ec794db1290dbd2ca88. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84ea8d0c-6b30-4859-a6d9-070332e6ba70.json and https://artists.proofprofile.net/proofs/artist/84ea8d0c-6b30-4859-a6d9-070332e6ba70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
album: Trickster Trickster
  type: MusicAlbum
  date published: 2012-09-21
album: Blitzpop
  type: MusicAlbum
  date published: 2014
album: Blitzpop
  type: MusicAlbum
  date published: 2014-09-05
album: Chicago
  type: MusicAlbum
  date published: 2015-07-01
album: Roads
  type: MusicAlbum
  date published: 2016-10-30
album: She's Bad
  type: MusicAlbum
  date published: 2016-11-18
album: She's Bad
  type: MusicAlbum
  date published: 2016-11-18
album: Capricorn (Club Edit)
  type: MusicAlbum
  date published: 2016-12-02
album: Lavender (Club Edit)
  type: MusicAlbum
  date published: 2016-12-02
album: Lavender (Club Edit)
  type: MusicAlbum
  date published: 2016-12-02
  track: Lavender - Club Edit
    type: MusicRecording
    duration: PT7M53S
    duration ms: 473453
    explicit: false
    by artist: Lapcat
    in album: Lavender (Club Edit)
      type: MusicAlbum
      date published: 2016-12-02
    isrc code: CH4131600066
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
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      type: PropertyValue
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T13:43:40Z
    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 0xb47621d23d49f77c9cafe2023c945947128a5d6c50bed1faf6e50f15b9ad8410. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:43:40Z), 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/CH4131600066.
      date published: 2026-07-20T13:43:40Z
    audio: Lavender - Club Edit
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 115.988
      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
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        value: 0.876
      additional property: Energy
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        value: 0.404
      additional property: Speechiness
        type: PropertyValue
        value: 0.059
      additional property: Acousticness
        type: PropertyValue
        value: 0.122
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.857
      additional property: Liveness
        type: PropertyValue
        value: 0.103
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.201
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.506
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Capricorn (Club Edit)
  type: MusicAlbum
  date published: 2016-12-02
album: Nebraska (Club Edit)
  type: MusicAlbum
  date published: 2016-12-16
album: Nebraska (Club Edit)
  type: MusicAlbum
  date published: 2016-12-16
album: Lavender (DMTR Remix)
  type: MusicAlbum
  date published: 2017-09-29
album: Lavender (DMTR Remix)
  type: MusicAlbum
  date published: 2017-09-29
album: She's Bad (Marlon Remix)
  type: MusicAlbum
  date published: 2018-04-20
album: Remember
  type: MusicAlbum
  date published: 2020-12-04
album: Light Giants
  type: MusicAlbum
  date published: 2021-02-12
album: You Wonder
  type: MusicAlbum
  date published: 2021-04-30
album: Till We Meet Again
  type: MusicAlbum
  date published: 2021-10-01
  track: Light Giants
    type: MusicRecording
    duration: PT3M59S
    duration ms: 239010
    explicit: false
    by artist: Lapcat
    in album: Till We Meet Again
      type: MusicAlbum
      date published: 2021-10-01
    isrc code: CH4132000066
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-14T19:16:47+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa9d4b6ce35cc1868ae41600d1d0fa2cb254ee673a01811845cb1472930a3b1dd
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    additional property: OTSBitcoinBlock
    additional property: OTSBitcoinBlockVerifyURL
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Light Giants
album: Where You Go
album: Jellyfish Kiss (Marlon Brandloch Remix)
album: Feed Back (Club Edit)
album: Equation (Interstate Edit)
album: Ringo (Magical Arrangement)

OTSBitcoinBlock
type: PropertyValue
value: 958054

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/958054

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4132000066

OTSTimestamp
type: PropertyValue
value: 2026-07-14T19:33:24Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d4b6ce35cc1868ae41600d1d0fa2cb254ee673a01811845cb1472930a3b1dd. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/CH4132000066.
date published: 2026-07-14T19:33:24Z

Light Giants
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 91.997
additional property: Musical Key
  type: PropertyValue
  value: 9
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.765
additional property: Energy
  type: PropertyValue
  value: 0.513
additional property: Speechiness
  type: PropertyValue
  value: 0.042
additional property: Acousticness
  type: PropertyValue
  value: 0.464
additional property: Instrumentalness
  type: PropertyValue
  value: 0.477
additional property: Liveness
  type: PropertyValue
  value: 0.125
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.239
additional property: Loudness (dB)
  type: PropertyValue
  value: -9.402
additional property: Key Name
  type: PropertyValue
  value: A
additional property: Mode Name
  type: PropertyValue
  value: Minor

Where You Go
type: MusicAlbum
date published: 2022-07-08

Jellyfish Kiss (Marlon Brandloch Remix)
type: MusicAlbum
date published: 2022-09-01

Feed Back (Club Edit)
type: MusicAlbum
date published: 2022-09-30

Equation (Interstate Edit)
type: MusicAlbum
date published: 2023-05-12

Ringo (Magical Arrangement)
type: MusicAlbum
date published: 2024-12-06