Kamil Kempiński
type: MusicGroup
popularity: 19
followers: 2502
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf704eb9b4d445c47f1bdcd5f265f2046ac71566fe41d4a1515901424cf527c24
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953657
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953657
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4c51f70a-d83c-49f0-97e1-2501eab221dc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4c51f70a-d83c-49f0-97e1-2501eab221dc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4c51f70a-d83c-49f0-97e1-2501eab221dc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T16:43:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf704eb9b4d445c47f1bdcd5f265f2046ac71566fe41d4a1515901424cf527c24","name":"Kamil Kempiński","registered_at":"2026-06-14T12:26:52Z","symbol":"NIM0452636","token_address":"0x2976de4dd51beb0762c78ff996459cd12b2240f8","type":"artist","uuid":"4c51f70a-d83c-49f0-97e1-2501eab221dc"}
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 0xf704eb9b4d445c47f1bdcd5f265f2046ac71566fe41d4a1515901424cf527c24. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c51f70a-d83c-49f0-97e1-2501eab221dc.json and https://artists.proofprofile.net/proofs/artist/4c51f70a-d83c-49f0-97e1-2501eab221dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T16:43:25Z
  text: {"copyright_id":"0xf704eb9b4d445c47f1bdcd5f265f2046ac71566fe41d4a1515901424cf527c24","name":"Kamil Kempiński","registered_at":"2026-06-14T12:26:52Z","symbol":"NIM0452636","token_address":"0x2976de4dd51beb0762c78ff996459cd12b2240f8","type":"artist","uuid":"4c51f70a-d83c-49f0-97e1-2501eab221dc"}
album: W Mojej Mgle
  type: MusicAlbum
  date published: 2020-03-18
album: Płyń
  type: MusicAlbum
  date published: 2020-03-18
album: Zostań (live)
  type: MusicAlbum
  date published: 2020-03-18
album: Z Tobą
  type: MusicAlbum
  date published: 2020-03-18
album: Oddalamy się od siebie
  type: MusicAlbum
  date published: 2020-05-22
album: Something Wrong
  type: MusicAlbum
  date published: 2020-05-30
album: Ostatnia piosenka o tobie
  type: MusicAlbum
  date published: 2020-10-09
album: Red Flag
  type: MusicAlbum
  date published: 2021-09-15
  track: Red Flag
    type: MusicRecording
    duration: PT2M48S
    duration ms: 168224
    explicit: true
    by artist: Kamil Kempiński
    in album: Red Flag
      type: MusicAlbum
      date published: 2021-09-15
    isrc code: PLB172100551
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-13T19:16:15+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6e995fff00cc50fa6fa6b7facb5892cfa48dc932afd526ecd6b2ae56f60a70f7
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957965
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957965
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLB172100551
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-14T07:07:52Z
    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 0x6e995fff00cc50fa6fa6b7facb5892cfa48dc932afd526ecd6b2ae56f60a70f7. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/PLB172100551.
      date published: 2026-07-14T07:07:52Z
    audio: Red Flag
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 107.041
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.786
      additional property: Energy
        type: PropertyValue
        value: 0.622
      additional property: Speechiness
        type: PropertyValue
        value: 0.08
      additional property: Acousticness
        type: PropertyValue
        value: 0.567
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.211
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.519
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.286
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Sabotażysta
  type: MusicAlbum
  date published: 2023-06-14
  track: Sabotażysta
    type: MusicRecording
    duration: PT3M24S
    duration ms: 204000
    explicit: false
    by artist: Kamil Kempiński
    in album: Sabotażysta
      type: MusicAlbum
      date published: 2023-06-14
    isrc code: PLB172300233
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T00:23:15+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x082ef6192f37bebb1909387984bdee5ebda280950f6c75f1d31f69ac893143f7
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956440
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956440
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLB172300233
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T04:03:57Z
    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 0x082ef6192f37bebb1909387984bdee5ebda280950f6c75f1d31f69ac893143f7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PLB172300233.
      date published: 2026-07-03T04:03:57Z
    audio: Sabotażysta
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 130.016
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      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: Przepraszam
album: W innym kolorze

Danceability
type: PropertyValue
value: 0.667

Energy
type: PropertyValue
value: 0.563

Speechiness
type: PropertyValue
value: 0.033

Acousticness
type: PropertyValue
value: 0.028

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.058

Valence (Positivity)
type: PropertyValue
value: 0.89

Loudness (dB)
type: PropertyValue
value: -4.596

Key Name
type: PropertyValue
value: E

Mode Name
type: PropertyValue
value: Major

Przepraszam
type: MusicAlbum
date published: 2023-08-31
track: Przepraszam
  type: MusicRecording
  duration: PT2M59S
  duration ms: 179961
  explicit: false
  by artist: Kamil Kempiński
  in album: Przepraszam
    type: MusicAlbum
    date published: 2023-08-31
  isrc code: PLB172300295
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T21:39:03+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb15cf40a8c639d08a9bdf95f39a8ba92be9ff5a6387c265cad464f835104c745
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956857
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956857
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLB172300295
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-06T01:26:17Z
  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 0xb15cf40a8c639d08a9bdf95f39a8ba92be9ff5a6387c265cad464f835104c745. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLB172300295.
    date published: 2026-07-06T01:26:17Z
  audio: Przepraszam
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 100.047
    additional property: Musical Key
      type: PropertyValue
      value: 1
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.374
    additional property: Energy
      type: PropertyValue
      value: 0.382
    additional property: Speechiness
      type: PropertyValue
      value: 0.034
    additional property: Acousticness
      type: PropertyValue
      value: 0.789
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.003
    additional property: Liveness
      type: PropertyValue
      value: 0.11
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.157
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.279
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Minor

W innym kolorze
type: MusicAlbum
date published: 2023-09-29
track: W innym kolorze
  type: MusicRecording
  duration: PT3M22S
  duration ms: 202494
  explicit: false
  by artist: Kamil Kempiński
  in album: W innym kolorze
    type: MusicAlbum
    date published: 2023-09-29
  isrc code: PLB172300341
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T23:53:48+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x9f40abe0677aa2f2400c1034be49b0b2d41136259cc7ff74e17cc88bc41b3988
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958468
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958468
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLB172300341
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-18T00:27:51Z
  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 0x9f40abe0677aa2f2400c1034be49b0b2d41136259cc7ff74e17cc88bc41b3988. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/PLB172300341.
    date published: 2026-07-18T00:27:51Z
  audio: W innym kolorze
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 81.492
    additional property: Musical Key
      type: PropertyValue
      value: 11
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.604
    additional property: Energy
      type: PropertyValue
      value: 0.62
    additional property: Speechiness
      type: PropertyValue
      value: 0.056
    additional property: Acousticness
      type: PropertyValue
      value: 0.269
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.112
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.715
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.749
    additional property: Key Name
      type: PropertyValue
      value: B
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Sabotażysta
type: MusicAlbum
date published: 2023-10-20
track: Poduszka
  type: MusicRecording
  duration: PT3M44S
  duration ms: 224100
  explicit: false
  by artist: Kamil Kempiński
  in album: Sabotażysta
    type: MusicAlbum
    date published: 2023-10-20
  isrc code: PLB172300354
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T21:57:43+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x9dffb8849ab9bb480586eb499295cf2c06468eec228c2a202a8d7448b7e0c290
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956639
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956639
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLB172300354
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-04T11:19:20Z
  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 0x9dffb8849ab9bb480586eb499295cf2c06468eec228c2a202a8d7448b7e0c290. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLB172300354.
    date published: 2026-07-04T11:19:20Z
  audio: Poduszka
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 98.201
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.33
    additional property: Energy
      type: PropertyValue
      value: 0.264
    additional property: Speechiness
      type: PropertyValue
      value: 0.028
    additional property: Acousticness
      type: PropertyValue
      value: 0.824
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.208
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.224
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.161
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major