Jan Kondrak
type: MusicGroup
popularity: 7
followers: 936
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa2a58a4f0d18c9d1dfe02dd8bf46d1a0f2910183207564d6eb35f1d437749513
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/8ee5f721-cfad-4304-941c-1fd8093fcf4d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8ee5f721-cfad-4304-941c-1fd8093fcf4d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8ee5f721-cfad-4304-941c-1fd8093fcf4d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa2a58a4f0d18c9d1dfe02dd8bf46d1a0f2910183207564d6eb35f1d437749513","name":"Jan Kondrak","registered_at":"2026-06-17T15:28:05Z","symbol":"NIM1438370","token_address":"0x95cc9adcf6f30db40753c65eced42f04210de4bd","type":"artist","uuid":"8ee5f721-cfad-4304-941c-1fd8093fcf4d"}
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a58a4f0d18c9d1dfe02dd8bf46d1a0f2910183207564d6eb35f1d437749513. 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/8ee5f721-cfad-4304-941c-1fd8093fcf4d.json and https://artists.proofprofile.net/proofs/artist/8ee5f721-cfad-4304-941c-1fd8093fcf4d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0xa2a58a4f0d18c9d1dfe02dd8bf46d1a0f2910183207564d6eb35f1d437749513","name":"Jan Kondrak","registered_at":"2026-06-17T15:28:05Z","symbol":"NIM1438370","token_address":"0x95cc9adcf6f30db40753c65eced42f04210de4bd","type":"artist","uuid":"8ee5f721-cfad-4304-941c-1fd8093fcf4d"}
album: Kto co
  type: MusicAlbum
  date published: 2008
album: Tango Triste (Reedycja)
  type: MusicAlbum
  date published: 2014-02-10
  track: Wędrówką życie jest człowieka - Remastered
    type: MusicRecording
    duration: PT2M29S
    duration ms: 149025
    explicit: false
    by artist: Jan Kondrak
    in album: Tango Triste (Reedycja)
      type: MusicAlbum
      date published: 2014-02-10
    isrc code: PLJ451400215
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T18:25:33+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa62efbc4be484826499bdff9b2a4c3945d654a176166894f7fb9ac295bfc4b81
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956545
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956545
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLJ451400215
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T19:59:51Z
    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 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 0xa62efbc4be484826499bdff9b2a4c3945d654a176166894f7fb9ac295bfc4b81. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLJ451400215.
      date published: 2026-07-03T19:59:51Z
    audio: Wędrówką życie jest człowieka - Remastered
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 171.563
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.457
      additional property: Energy
        type: PropertyValue
        value: 0.241
      additional property: Speechiness
        type: PropertyValue
        value: 0.041
      additional property: Acousticness
        type: PropertyValue
        value: 0.851
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.126
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.296
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.765
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Missa Pagana (Reedycja)
  type: MusicAlbum
  date published: 2014-02-10
track: Modlitwa Żałobna
  type: MusicRecording
  duration: PT5M9S
  duration ms: 309946
  explicit: false
  by artist: Kuba Badach
  by artist: Dorota Miskiewicz
  by artist: Łukasz Jemioła
  by artist: Ania Michałowska
  by artist: Jan Kondrak
  by artist: Piotr Selim
  by artist: Natalia Wilk
  by artist: Jolka Sip
  in album: Wieczorem
    type: MusicAlbum
    date published: 2013-10-04
  isrc code: PLC591300026
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-30T10:00:17+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc4945b0eed2a3f17d9bc6351821c25860135330e9d679992ef3d43980451e20e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960247
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960247
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLC591300026
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T10:42:33Z
  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 0xc4945b0eed2a3f17d9bc6351821c25860135330e9d679992ef3d43980451e20e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PLC591300026.
    date published: 2026-07-30T10:42:33Z
  audio: Modlitwa Żałobna
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 184.252
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.324
    additional property: Energy
      type: PropertyValue
      value: 0.782
    additional property: Speechiness
      type: PropertyValue
      value: 0.467
    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

Acousticness
type: PropertyValue
value: 0.851

Instrumentalness
type: PropertyValue
value: 0.003

Liveness
type: PropertyValue
value: 0.701

Valence (Positivity)
type: PropertyValue
value: 0.309

Loudness (dB)
type: PropertyValue
value: -13.523

Key Name
type: PropertyValue
value: A

Mode Name
type: PropertyValue
value: Minor