KEPTAIN
type: MusicGroup
popularity: 7
followers: 791
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xba94f5c0bf128920262ebf995e4dea4e88899c0a1319fc7a6663942aec0a371a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8fb281f5-74b2-485c-a092-9dd40937ca70.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8fb281f5-74b2-485c-a092-9dd40937ca70.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8fb281f5-74b2-485c-a092-9dd40937ca70
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
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 0xba94f5c0bf128920262ebf995e4dea4e88899c0a1319fc7a6663942aec0a371a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fb281f5-74b2-485c-a092-9dd40937ca70.json and https://artists.proofprofile.net/proofs/artist/8fb281f5-74b2-485c-a092-9dd40937ca70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
album: Buurman Mol
  type: MusicAlbum
  date published: 2019-06-14
album: Buurman Mol
  type: MusicAlbum
  date published: 2019-06-14
  track: Buurman Mol
    type: MusicRecording
    duration: PT2M49S
    duration ms: 169378
    explicit: false
    by artist: KEPTAIN
    in album: Buurman Mol
      type: MusicAlbum
      date published: 2019-06-14
    isrc code: QZNWZ2024186
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-12T22:20:20+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb2e5b42d1ddc11f7743eee1eccc6d9461f6bdf2860dbe490fab423ec481cfd4f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957770
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957770
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2024186
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-12T23:17:00Z
    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 0xb2e5b42d1ddc11f7743eee1eccc6d9461f6bdf2860dbe490fab423ec481cfd4f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZNWZ2024186.
      date published: 2026-07-12T23:17:00Z
    audio: Buurman Mol
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 175.142
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.638
      additional property: Energy
        type: PropertyValue
        value: 0.751
      additional property: Speechiness
        type: PropertyValue
        value: 0.156
      additional property: Acousticness
        type: PropertyValue
        value: 0.006
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.26
      additional property: Liveness
        type: PropertyValue
        value: 0.252
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.616
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.421
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Buurman Mol
  type: MusicAlbum
  date published: 2019-06-14
album: Fallen Leaves
  type: MusicAlbum
  date published: 2019-06-19
album: Kutzooi
  type: MusicAlbum
  date published: 2019-07-09
album: Lofi Christmas
  type: MusicAlbum
  date published: 2019-12-07
album: Pink Chateau
  type: MusicAlbum
  date published: 2020-03-03
album: Pink Chateau
  type: MusicAlbum
  date published: 2020-03-03
album: Kniegewricht
  type: MusicAlbum
  date published: 2020-09-09
album: Pot Augurken
  type: MusicAlbum
  date published: 2020-09-18
album: Hoedje Van Papier
  type: MusicAlbum
  date published: 2020-10-10
album: Fireflies
  type: MusicAlbum
  date published: 2020-11-06
album: Kaas is Baas
  type: MusicAlbum
  date published: 2021-06-04
  track: Kaas is Baas
    type: MusicRecording
    duration: PT1M4S
    duration ms: 64766
    explicit: false
    by artist: KEPTAIN
    in album: Kaas is Baas
      type: MusicAlbum
      date published: 2021-06-04
    isrc code: QZHN92105102
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T13:41:43+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xef5ccf867d2592279109530d57ea37955aea29cd090d48db03a95cbecefbe951
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956822
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956822
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN92105102
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T18:48:28Z
    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 0xef5ccf867d2592279109530d57ea37955aea29cd090d48db03a95cbecefbe951. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN92105102.
      date published: 2026-07-05T18:48:28Z
    audio: Kaas is Baas
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 92.038
      additional property: Musical Key
      additional property: Mode (Major/Minor)
      additional property: Time Signature
      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Kaas Is Baas (Instrumentaal)
album: Never Gonna Give You Up (Lofi Cover)
album: The Duck Song (Lofi Cover)
album: Ik Verloor Mijn Koekie In De Disco (Lofi Cover)
album: Bami Pok Pok
album: Mr Blik (Koencore Remix Hard Version)
album: Bakkie Pleur
album: Horlepiep
album: Bitcoin Ninjas
album: Quantum Cat
album: Alien Gringos
album: BBPN (Bullish Bitcoin Pizza Ninjas)
album: Vom selben Stern
album: DOG•GO•TO•THE•MOON
album: Fock Hokjes
album: My First Slice

Musical Key
type: PropertyValue
value: 0

Mode (Major/Minor)
type: PropertyValue
value: 1

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.852

Energy
type: PropertyValue
value: 0.845

Speechiness
type: PropertyValue
value: 0.192

Acousticness
type: PropertyValue
value: 0.095

Instrumentalness
type: PropertyValue
value: 0.004

Liveness
type: PropertyValue
value: 0.17

Valence (Positivity)
type: PropertyValue
value: 0.706

Loudness (dB)
type: PropertyValue
value: -7.704

Key Name
type: PropertyValue
value: C

Mode Name
type: PropertyValue
value: Major

Kaas Is Baas (Instrumentaal)
type: MusicAlbum
date published: 2021-07-14

Never Gonna Give You Up (Lofi Cover)
type: MusicAlbum
date published: 2021-07-16

The Duck Song (Lofi Cover)
type: MusicAlbum
date published: 2021-07-16

Ik Verloor Mijn Koekie In De Disco (Lofi Cover)
type: MusicAlbum
date published: 2021-08-27

Bami Pok Pok
type: MusicAlbum
date published: 2021-10-18

Mr Blik (Koencore Remix Hard Version)
type: MusicAlbum
date published: 2021-11-01

Bakkie Pleur
type: MusicAlbum
date published: 2022-10-20

Horlepiep
type: MusicAlbum
date published: 2023-07-29

Bitcoin Ninjas
type: MusicAlbum
date published: 2023-12-03

Quantum Cat
type: MusicAlbum
date published: 2024-01-29

Alien Gringos
type: MusicAlbum
date published: 2024-02-18

BBPN (Bullish Bitcoin Pizza Ninjas)
type: MusicAlbum
date published: 2024-03-02

Vom selben Stern
type: MusicAlbum
date published: 2024-04-06

DOG•GO•TO•THE•MOON
type: MusicAlbum
date published: 2024-06-22

Fock Hokjes
type: MusicAlbum
date published: 2024-07-07

My First Slice
type: MusicAlbum
date published: 2024-07-24

Fock Hokjes
type: MusicAlbum
date published: 2024-09-27