Leon Kaczmarczyk
type: MusicGroup
genre: indie dance
popularity: 4
followers: 94
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e5e28b2b-6ba8-4d23-8027-9d979f439f1d.ots
additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566007246a96287db28d74eeda8be8751478a222fac4b8a9ee1a59a1d1326942. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5e28b2b-6ba8-4d23-8027-9d979f439f1d.json and https://artists.proofprofile.net/proofs/artist/e5e28b2b-6ba8-4d23-8027-9d979f439f1d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
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album: CONSCIOUSNESS
  type: MusicAlbum
  date published: 2021-05-08
album: New Day
  type: MusicAlbum
  date published: 2022-11-10
album: Walk
  type: MusicAlbum
  date published: 2023-01-01
album: Inner Child
  type: MusicAlbum
  date published: 2023-01-31
album: Utopia
  type: MusicAlbum
  date published: 2023-02-06
album: Change
  type: MusicAlbum
  date published: 2023-03-18
album: Soulmates
  type: MusicAlbum
  date published: 2023-08-28
album: Unity
  type: MusicAlbum
  date published: 2023-09-29
album: Seven
  type: MusicAlbum
  date published: 2023-11-10
album: Lisa
  type: MusicAlbum
  date published: 2023-11-16
album: Fly
  type: MusicAlbum
  date published: 2023-11-28
album: Fate (STARCORE Remix)
  type: MusicAlbum
  date published: 2023-12-31
album: Grounded
  type: MusicAlbum
  date published: 2024-03-13
album: Virtue
  type: MusicAlbum
  date published: 2024-03-25
album: Away
  type: MusicAlbum
  date published: 2024-05-20
album: Sunrise
  type: MusicAlbum
  date published: 2024-08-15
album: Feeling
  type: MusicAlbum
  date published: 2024-09-20
album: Journey
  type: MusicAlbum
  date published: 2024-11-22
album: Origin
  type: MusicAlbum
  date published: 2025-01-16
album: DownBeat
  type: MusicAlbum
  date published: 2025-02-07
  track: DownBeat
    type: MusicRecording
    duration: PT3M31S
    duration ms: 211953
    explicit: false
    by artist: Leon Kaczmarczyk
    in album: DownBeat
      type: MusicAlbum
      date published: 2025-02-07
    genre: indie dance
    isrc code: AEA2T2500007
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    additional property: CopyrightStatus
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      type: PropertyValue
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      type: PropertyValue
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    additional property: OTSVerificationAPI
      type: PropertyValue
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T22:59:44Z
    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 0xbf7fbb49119b4d7917b55d80f83e1aaaa3558107967ee6ed792310b8bbe84d02. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/AEA2T2500007.
      date published: 2026-07-18T22:59:44Z
    audio: DownBeat
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 127.002
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.667
      additional property: Energy
        type: PropertyValue
        value: 0.411
      additional property: Speechiness
        type: PropertyValue
        value: 0.036
      additional property: Acousticness
        type: PropertyValue
        value: 0.02
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.88
      additional property: Liveness
        type: PropertyValue
        value: 0.112
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.194
      additional property: Loudness (dB)
        type: PropertyValue
        value: -14.572
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Decancy
  type: MusicAlbum
  date published: 2025-02-23
album: Journey (Remixes)
  type: MusicAlbum
  date published: 2025-03-21
  track: Connected (Der Energieberater Remix)
    type: MusicRecording
    duration: PT3M57S
    duration ms: 237761
    explicit: false
    by artist: Leon Kaczmarczyk
    in album: Journey (Remixes)
      type: MusicAlbum
      date published: 2025-03-21
    genre: indie dance
    isrc code: TCAJH2504917
    additional property: CopyrightID
    additional property: CopyrightStatus
    additional property: CopyrightRegisteredAt
    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: Connected (Der Energieberater Remix)
album: Solve
album: Je mens chaque fois (Leon Kaczmarczyk Remix)

CopyrightID
type: PropertyValue

CopyrightStatus
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value: registered

CopyrightRegisteredAt
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CopyrightChainExplorerURL
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value: https://explorer.copyrightchains.com/tx/0xee93bdafa238f6cb0466cc1622d2f14a8bc7e691cec6a9fe3ea7e4a9515f1879

OTSHash
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OTSBitcoinBlock
type: PropertyValue
value: 959058

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/959058

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJH2504917

OTSTimestamp
type: PropertyValue
value: 2026-07-21T23:50:15Z

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 0xee93bdafa238f6cb0466cc1622d2f14a8bc7e691cec6a9fe3ea7e4a9515f1879. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:50:15Z), 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/TCAJH2504917.
date published: 2026-07-21T23:50:15Z

Connected (Der Energieberater Remix)
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 126.031
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: 0.777
additional property: Energy
  type: PropertyValue
  value: 0.724
additional property: Speechiness
  type: PropertyValue
  value: 0.066
additional property: Acousticness
  type: PropertyValue
  value: 0
additional property: Instrumentalness
  type: PropertyValue
  value: 0.057
additional property: Liveness
  type: PropertyValue
  value: 0.085
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.33
additional property: Loudness (dB)
  type: PropertyValue
  value: -7.358
additional property: Key Name
  type: PropertyValue
  value: G
additional property: Mode Name
  type: PropertyValue
  value: Major

Solve
type: MusicAlbum
date published: 2025-06-06

Je mens chaque fois (Leon Kaczmarczyk Remix)
type: MusicAlbum
date published: 2025-07-18