Jana Koubková
type: MusicGroup
popularity: 8
followers: 681
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6dcb8568a6e41d3f093dfd8cb54b67b375c2596b8773174ac921e6101600c855
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953954
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953954
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/250c70c2-2c5d-4adf-8bd5-752cb29dc4d9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/250c70c2-2c5d-4adf-8bd5-752cb29dc4d9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/250c70c2-2c5d-4adf-8bd5-752cb29dc4d9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T14:18:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6dcb8568a6e41d3f093dfd8cb54b67b375c2596b8773174ac921e6101600c855","name":"Jana Koubková","registered_at":"2026-06-16T02:30:43Z","symbol":"NIM0909369","token_address":"0xbad11d02bad6c5090fed902e1c297da8ae333841","type":"artist","uuid":"250c70c2-2c5d-4adf-8bd5-752cb29dc4d9"}
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 0x6dcb8568a6e41d3f093dfd8cb54b67b375c2596b8773174ac921e6101600c855. Chain 2 (Bitcoin): anchored in block 953955 (2026-06-16T14:29:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/250c70c2-2c5d-4adf-8bd5-752cb29dc4d9.json and https://artists.proofprofile.net/proofs/artist/250c70c2-2c5d-4adf-8bd5-752cb29dc4d9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T14:29:53Z
  text: {"copyright_id":"0x6dcb8568a6e41d3f093dfd8cb54b67b375c2596b8773174ac921e6101600c855","name":"Jana Koubková","registered_at":"2026-06-16T02:30:43Z","symbol":"NIM0909369","token_address":"0xbad11d02bad6c5090fed902e1c297da8ae333841","type":"artist","uuid":"250c70c2-2c5d-4adf-8bd5-752cb29dc4d9"}
album: Mini Jazz Klub, Vol. 23.
  type: MusicAlbum
  date published: 1979
album: Horký Dech
  type: MusicAlbum
  date published: 1982
album: Mini Jazz Klub, Vol. 38
  type: MusicAlbum
  date published: 1984
album: Bosa
  type: MusicAlbum
  date published: 1985
  track: Nijána
    type: MusicRecording
    duration: PT6M15S
    duration ms: 375373
    explicit: false
    by artist: Jana Koubková
    in album: Bosa
      type: MusicAlbum
      date published: 1985
    isrc code: CZA168500671
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T05:54:13+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x856eb16ad67cc692419639b692d84cb3dc4f39b506632aebe44cc73e75bdf611
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956790
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956790
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA168500671
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T12:31:54Z
    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 0x856eb16ad67cc692419639b692d84cb3dc4f39b506632aebe44cc73e75bdf611. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CZA168500671.
      date published: 2026-07-05T12:31:54Z
    audio: Nijána
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 93.624
      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: 0.73
      additional property: Energy
        type: PropertyValue
        value: 0.699
      additional property: Speechiness
        type: PropertyValue
        value: 0.048
      additional property: Acousticness
        type: PropertyValue
        value: 0.469
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.682
      additional property: Liveness
        type: PropertyValue
        value: 0.162
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.939
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.014
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Panta Rhei
  type: MusicAlbum
  date published: 1990
album: Horký dech
  type: MusicAlbum
  date published: 1993-01-01
album: Plesk!
  type: MusicAlbum
  date published: 1994-01-01
album: Tenerife blues
  type: MusicAlbum
  date published: 1997-10-03
album: Americký klub dam
  type: MusicAlbum
  date published: 2004-06-28
album: Live in Jazz Club
  type: MusicAlbum
  date published: 2005-07-21
album: The Appeal of Concience
  type: MusicAlbum
  date published: 2006-08-03
album: Jazz Na Hradě (Jana Koubková 65) (Live)
  type: MusicAlbum
  date published: 2009-06-07
album: Mýdlové Bubliny
  type: MusicAlbum
  date published: 2011-07-26
album: Jazz? Oh, Yes! (1976-2014)
  type: MusicAlbum
  date published: 2014-04-18
album: Jazz? Oh, Yes! (1976-2014)
  type: MusicAlbum
  date published: 2014-04-18
album: Mini Jazz Klub 38
  type: MusicAlbum
  date published: 2014-05-16
album: Bosa
  type: MusicAlbum
  date published: 2015-04-14
album: A Tak Si Jdu...
  type: MusicAlbum
  date published: 2016-08-19
album: Bugatti Step
  type: MusicAlbum
  date published: 2020-10-08
album: Blues (ne)ohrožené seniorky
  type: MusicAlbum
  date published: 2021-06-11
track: Nijána
  type: MusicRecording
  duration: PT6M15S
  duration ms: 375536
  explicit: false
  by artist: Bill Brewster
  by artist: Jana Koubková
  in album: Late Night Tales Presents: After Dark - Vespertine
    type: MusicAlbum
    date published: 2023-08-04
  isrc code: CZA168500671
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T05:54:13+00:00
  additional property: CopyrightChainExplorerURL
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Nijána

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x856eb16ad67cc692419639b692d84cb3dc4f39b506632aebe44cc73e75bdf611

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 957118

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/957118

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA168500671

OTSTimestamp
type: PropertyValue
value: 2026-07-08T03:20:19Z

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 0x856eb16ad67cc692419639b692d84cb3dc4f39b506632aebe44cc73e75bdf611. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CZA168500671.
date published: 2026-07-08T03:20:19Z

Nijána
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 113.66
additional property: Musical Key
  type: PropertyValue
  value: 7
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.733
additional property: Energy
  type: PropertyValue
  value: 0.519
additional property: Speechiness
  type: PropertyValue
  value: 0.052
additional property: Acousticness
  type: PropertyValue
  value: 0.57
additional property: Instrumentalness
  type: PropertyValue
  value: 0.758
additional property: Liveness
  type: PropertyValue
  value: 0.128
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.908
additional property: Loudness (dB)
  type: PropertyValue
  value: -19.441
additional property: Key Name
  type: PropertyValue
  value: G
additional property: Mode Name
  type: PropertyValue
  value: Major