Leon Firšt
type: MusicGroup
popularity: 9
followers: 72
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf5a4354e61972ee3d4380b023a3c0a2fe3a104a36c225372fcc254b73f681454
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/efa0bf2a-3f1d-4c3a-a00f-00a3caf53e0d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/efa0bf2a-3f1d-4c3a-a00f-00a3caf53e0d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/efa0bf2a-3f1d-4c3a-a00f-00a3caf53e0d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf5a4354e61972ee3d4380b023a3c0a2fe3a104a36c225372fcc254b73f681454","name":"Leon Firšt","registered_at":"2026-06-21T12:24:25Z","symbol":"NIM1922647","token_address":"0x32572564591950cbfa3f7eba31aa6be6d26a9c62","type":"artist","uuid":"efa0bf2a-3f1d-4c3a-a00f-00a3caf53e0d"}
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 0xf5a4354e61972ee3d4380b023a3c0a2fe3a104a36c225372fcc254b73f681454. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efa0bf2a-3f1d-4c3a-a00f-00a3caf53e0d.json and https://artists.proofprofile.net/proofs/artist/efa0bf2a-3f1d-4c3a-a00f-00a3caf53e0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0xf5a4354e61972ee3d4380b023a3c0a2fe3a104a36c225372fcc254b73f681454","name":"Leon Firšt","registered_at":"2026-06-21T12:24:25Z","symbol":"NIM1922647","token_address":"0x32572564591950cbfa3f7eba31aa6be6d26a9c62","type":"artist","uuid":"efa0bf2a-3f1d-4c3a-a00f-00a3caf53e0d"}
album: Veronika Deseniška
  type: MusicAlbum
  date published: 2017-11-08
album: Kure?!
  type: MusicAlbum
  date published: 2021-06-16
album: Entourer
  type: MusicAlbum
  date published: 2024-08-26
  track: Balkan Suite: Macedonian Girl
    type: MusicRecording
    duration: PT4M7S
    duration ms: 247244
    explicit: false
    by artist: Leon Firšt
    in album: Entourer
      type: MusicAlbum
      date published: 2024-08-26
    isrc code: SIA632400465
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T23:23:49+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xff7c3808b402a6fc4ae8151e968c476d494c64cbec31cb876045a1f975912af0
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958212
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958212
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SIA632400465
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T23:25:50Z
    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 0xff7c3808b402a6fc4ae8151e968c476d494c64cbec31cb876045a1f975912af0. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/SIA632400465.
      date published: 2026-07-15T23:25:50Z
    audio: Balkan Suite: Macedonian Girl
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 167.036
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.297
      additional property: Energy
        type: PropertyValue
        value: 0.188
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.894
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.845
      additional property: Liveness
        type: PropertyValue
        value: 0.104
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.304
      additional property: Loudness (dB)
        type: PropertyValue
        value: -17.037
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Minor