Sara Kordowska
type: MusicGroup
popularity: 17
followers: 1184
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xafe6f2b6fd291b0ac43997d6aad934efd9157748a95ae9ba1b0e7f764935198c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953707
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953707
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7c9e96de-82dc-4498-b724-dd765ede585c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7c9e96de-82dc-4498-b724-dd765ede585c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7c9e96de-82dc-4498-b724-dd765ede585c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T23:22:21Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xafe6f2b6fd291b0ac43997d6aad934efd9157748a95ae9ba1b0e7f764935198c","name":"Sara Kordowska","registered_at":"2026-06-14T17:37:07Z","symbol":"NIM0526685","token_address":"0x03105513b7ec9c297d1f76633339c87c9a4f723f","type":"artist","uuid":"7c9e96de-82dc-4498-b724-dd765ede585c"}
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 0xafe6f2b6fd291b0ac43997d6aad934efd9157748a95ae9ba1b0e7f764935198c. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c9e96de-82dc-4498-b724-dd765ede585c.json and https://artists.proofprofile.net/proofs/artist/7c9e96de-82dc-4498-b724-dd765ede585c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T23:22:21Z
  text: {"copyright_id":"0xafe6f2b6fd291b0ac43997d6aad934efd9157748a95ae9ba1b0e7f764935198c","name":"Sara Kordowska","registered_at":"2026-06-14T17:37:07Z","symbol":"NIM0526685","token_address":"0x03105513b7ec9c297d1f76633339c87c9a4f723f","type":"artist","uuid":"7c9e96de-82dc-4498-b724-dd765ede585c"}
album: Wszystko i Nic
  type: MusicAlbum
  date published: 2019-10-04
album: Wszystko I Nic
  type: MusicAlbum
  date published: 2019-10-04
album: Kropka
  type: MusicAlbum
  date published: 2023-04-28
album: Buzia
  type: MusicAlbum
  date published: 2023-06-09
album: Niedziela
  type: MusicAlbum
  date published: 2023-07-21
album: OSP
  type: MusicAlbum
  date published: 2023-08-04
album: Oko
  type: MusicAlbum
  date published: 2023-08-25
album: Tarka
  type: MusicAlbum
  date published: 2023-09-22
album: Juki
  type: MusicAlbum
  date published: 2023-09-28
album: Matki wynalazku
  type: MusicAlbum
  date published: 2023-10-06
  track: Oko
    type: MusicRecording
    duration: PT3M44S
    duration ms: 224000
    explicit: false
    by artist: Sara Kordowska
    in album: Matki wynalazku
      type: MusicAlbum
      date published: 2023-10-06
    isrc code: PL50T2300089
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T18:07:40+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x054ef7d7fab05f2c5c47ae6169e6a88e924ec7d66bd3510e237da554f9b620c5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958185
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958185
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL50T2300089
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T18:19:04Z
    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 0x054ef7d7fab05f2c5c47ae6169e6a88e924ec7d66bd3510e237da554f9b620c5. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/PL50T2300089.
      date published: 2026-07-15T18:19:04Z
    audio: Oko
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 119.973
      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: 0.721
      additional property: Energy
        type: PropertyValue
        value: 0.249
      additional property: Speechiness
        type: PropertyValue
        value: 0.046
      additional property: Acousticness
        type: PropertyValue
        value: 0.688
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.002
      additional property: Liveness
        type: PropertyValue
        value: 0.342
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.233
      additional property: Loudness (dB)
        type: PropertyValue
        value: -16.078
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: Juki
    type: MusicRecording
    duration: PT1M59S
    duration ms: 119000
    explicit: false
    by artist: Sara Kordowska
    in album: Matki wynalazku
      type: MusicAlbum
      date published: 2023-10-06
    isrc code: PL50T2300100
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T02:53:36+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xda3851d6c5797f10299ebc5d262c28eed8845b1b2894d48c9eb47f1245a68975
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958955
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958955
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL50T2300100
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T03:03:40Z
    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 0xda3851d6c5797f10299ebc5d262c28eed8845b1b2894d48c9eb47f1245a68975. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/PL50T2300100.
      date published: 2026-07-21T03:03:40Z
    audio: Juki
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 120.015
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      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: Oko (Remix)
album: NIE DAŁOBY NIC
album: DZIECI DOKERÓW
album: SAGA
album: Gołębie
album: Strusie
album: Amstaff
album: Sarna

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.659

Energy
type: PropertyValue
value: 0.256

Speechiness
type: PropertyValue
value: 0.051

Acousticness
type: PropertyValue
value: 0.836

Instrumentalness
type: PropertyValue
value: 0.311

Liveness
type: PropertyValue
value: 0.106

Valence (Positivity)
type: PropertyValue
value: 0.18

Loudness (dB)
type: PropertyValue
value: -16.785

Key Name
type: PropertyValue
value: D

Mode Name
type: PropertyValue
value: Major

Oko (Remix)
type: MusicAlbum
date published: 2024-07-05

NIE DAŁOBY NIC
type: MusicAlbum
date published: 2024-08-09

DZIECI DOKERÓW
type: MusicAlbum
date published: 2024-09-13

SAGA
type: MusicAlbum
date published: 2024-11-22
track: SAGA
  type: MusicRecording
  duration: PT4M7S
  duration ms: 247407
  explicit: false
  by artist: Sara Kordowska
  in album: SAGA
    type: MusicAlbum
    date published: 2024-11-22
  isrc code: PL50T2400203
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T15:38:38+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x15d1392616d34671bddca082bd23a43c95b5ef3deae4337aac5dd5e446c9b31d
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956826
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956826
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL50T2400203
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T19:27:56Z
  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 0x15d1392616d34671bddca082bd23a43c95b5ef3deae4337aac5dd5e446c9b31d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PL50T2400203.
    date published: 2026-07-05T19:27:56Z
  audio: SAGA
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 121.456
    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: 0.788
    additional property: Energy
      type: PropertyValue
      value: 0.42
    additional property: Speechiness
      type: PropertyValue
      value: 0.052
    additional property: Acousticness
      type: PropertyValue
      value: 0.474
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.426
    additional property: Liveness
      type: PropertyValue
      value: 0.098
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.133
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.449
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor

DZIECI DOKERÓW
type: MusicAlbum
date published: 2025-01-17

Gołębie
type: MusicAlbum
date published: 2025-07-18
track: Gołębie
  type: MusicRecording
  duration: PT4M50S
  duration ms: 290109
  explicit: false
  by artist: Sara Kordowska
  in album: Gołębie
    type: MusicAlbum
    date published: 2025-07-18
  isrc code: PL50T2500123
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T19:02:26+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xd57860a86953c92d64c107329c82a33da74830a4ebed2690afdde5a2e5d66da6
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958601
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958601
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL50T2500123
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-18T19:27:02Z
  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 0xd57860a86953c92d64c107329c82a33da74830a4ebed2690afdde5a2e5d66da6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PL50T2500123.
    date published: 2026-07-18T19:27:02Z
  audio: Gołębie
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 120.084
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.691
    additional property: Energy
      type: PropertyValue
      value: 0.51
    additional property: Speechiness
      type: PropertyValue
      value: 0.067
    additional property: Acousticness
      type: PropertyValue
      value: 0.636
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.117
    additional property: Liveness
      type: PropertyValue
      value: 0.1
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.367
    additional property: Loudness (dB)
      type: PropertyValue
      value: -10.354
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Strusie
type: MusicAlbum
date published: 2025-08-22

Amstaff
type: MusicAlbum
date published: 2025-09-26

Sarna
type: MusicAlbum
date published: 2025-10-31