Clara Lemkova
type: MusicGroup
popularity: 6
followers: 1862
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9bed78f313f6349229584eeab367fc0746bb0d3f9e4c8b67be85ea27e5de70a2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954717
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954717
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f69ec19c-2c78-4dea-a814-70ce010c875b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f69ec19c-2c78-4dea-a814-70ce010c875b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f69ec19c-2c78-4dea-a814-70ce010c875b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T15:47:51Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9bed78f313f6349229584eeab367fc0746bb0d3f9e4c8b67be85ea27e5de70a2","name":"Clara Lemkova","registered_at":"2026-06-21T15:25:08Z","symbol":"NIM1960076","token_address":"0x8a37820409603afe9db4d8783fc4be2220663885","type":"artist","uuid":"f69ec19c-2c78-4dea-a814-70ce010c875b"}
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 0x9bed78f313f6349229584eeab367fc0746bb0d3f9e4c8b67be85ea27e5de70a2. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f69ec19c-2c78-4dea-a814-70ce010c875b.json and https://artists.proofprofile.net/proofs/artist/f69ec19c-2c78-4dea-a814-70ce010c875b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T15:47:51Z
  text: {"copyright_id":"0x9bed78f313f6349229584eeab367fc0746bb0d3f9e4c8b67be85ea27e5de70a2","name":"Clara Lemkova","registered_at":"2026-06-21T15:25:08Z","symbol":"NIM1960076","token_address":"0x8a37820409603afe9db4d8783fc4be2220663885","type":"artist","uuid":"f69ec19c-2c78-4dea-a814-70ce010c875b"}
album: Chá de Hortelã
  type: MusicAlbum
  date published: 2020-08-07
album: Girassóis de Van Gogh
  type: MusicAlbum
  date published: 2020-11-01
  track: Girassóis de Van Gogh
    type: MusicRecording
    duration: PT3M16S
    duration ms: 196323
    explicit: false
    by artist: Clara Lemkova
    in album: Girassóis de Van Gogh
      type: MusicAlbum
      date published: 2020-11-01
    isrc code: QZNJW2046125
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T08:31:19+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf8e0c0fed42c90920559ade310c0005b27eab8e18e76ef6b8091966ce4437f22
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958523
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958523
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJW2046125
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T08:54:12Z
    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 0xf8e0c0fed42c90920559ade310c0005b27eab8e18e76ef6b8091966ce4437f22. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZNJW2046125.
      date published: 2026-07-18T08:54:12Z
    audio: Girassóis de Van Gogh
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 89.969
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.694
      additional property: Energy
        type: PropertyValue
        value: 0.332
      additional property: Speechiness
        type: PropertyValue
        value: 0.038
      additional property: Acousticness
        type: PropertyValue
        value: 0.846
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.116
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.277
      additional property: Loudness (dB)
        type: PropertyValue
        value: -14.221
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Sai da Minha Casa
  type: MusicAlbum
  date published: 2021-07-19
album: Preciso de Você
  type: MusicAlbum
  date published: 2022-02-25
album: Ansiedade
  type: MusicAlbum
  date published: 2023-04-05
  track: Ansiedade
    type: MusicRecording
    duration: PT3M38S
    duration ms: 218795
    explicit: false
    by artist: Clara Lemkova
    in album: Ansiedade
      type: MusicAlbum
      date published: 2023-04-05
    isrc code: QZGLS2365731
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T08:36:30+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3ea20daba336c7df02c5e85b3b9636ee73adff1b233613a0e2ad6daf3aadf5ca
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958853
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958853
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2365731
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T11:38:45Z
    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 0x3ea20daba336c7df02c5e85b3b9636ee73adff1b233613a0e2ad6daf3aadf5ca. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:38:45Z), 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/QZGLS2365731.
      date published: 2026-07-20T11:38:45Z
    audio: Ansiedade
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 117.039
      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: 0.683
      additional property: Energy
        type: PropertyValue
        value: 0.616
      additional property: Speechiness
        type: PropertyValue
        value: 0.029
      additional property: Acousticness
        type: PropertyValue
        value: 0.298
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Garoto
album: Meu Lar

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.306

Valence (Positivity)
type: PropertyValue
value: 0.638

Loudness (dB)
type: PropertyValue
value: -7.502

Key Name
type: PropertyValue
value: D

Mode Name
type: PropertyValue
value: Major

Garoto
type: MusicAlbum
date published: 2023-06-19

Meu Lar
type: MusicAlbum
date published: 2024-10-08