Lefteris Ioannou
type: MusicGroup
popularity: 10
followers: 85
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe1893d1f4f478dbf0895c39bd1208406c2cd17ff798cb40f0ae9f52fe56d20e9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954058
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954058
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/43b6e1c3-d563-47b5-afef-b76d0e18bb5e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/43b6e1c3-d563-47b5-afef-b76d0e18bb5e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/43b6e1c3-d563-47b5-afef-b76d0e18bb5e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T06:34:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe1893d1f4f478dbf0895c39bd1208406c2cd17ff798cb40f0ae9f52fe56d20e9","name":"Lefteris Ioannou","registered_at":"2026-06-16T13:28:42Z","symbol":"NIM1066434","token_address":"0x492fcd3936e0dbec676d5979c4b914db681eb31e","type":"artist","uuid":"43b6e1c3-d563-47b5-afef-b76d0e18bb5e"}
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 0xe1893d1f4f478dbf0895c39bd1208406c2cd17ff798cb40f0ae9f52fe56d20e9. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43b6e1c3-d563-47b5-afef-b76d0e18bb5e.json and https://artists.proofprofile.net/proofs/artist/43b6e1c3-d563-47b5-afef-b76d0e18bb5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T06:34:31Z
  text: {"copyright_id":"0xe1893d1f4f478dbf0895c39bd1208406c2cd17ff798cb40f0ae9f52fe56d20e9","name":"Lefteris Ioannou","registered_at":"2026-06-16T13:28:42Z","symbol":"NIM1066434","token_address":"0x492fcd3936e0dbec676d5979c4b914db681eb31e","type":"artist","uuid":"43b6e1c3-d563-47b5-afef-b76d0e18bb5e"}
album: The Eye of the Storm: Tales of Transition
  type: MusicAlbum
  date published: 2021-01-13
album: 1+1=ENA (Original Theatre Soundtrack)
  type: MusicAlbum
  date published: 2022-02-03
album: PONY (Original Motion Picture Soundtrack)
  type: MusicAlbum
  date published: 2022-10-28
album: Change
  type: MusicAlbum
  date published: 2023-01-20
album: Riddles in Motion
  type: MusicAlbum
  date published: 2023-03-17
album: The Latinx Photography Project (Original Motion Picture Soundtrack)
  type: MusicAlbum
  date published: 2023-04-14
album: Uintas (Original Soundtrack)
  type: MusicAlbum
  date published: 2024-06-27
album: Waking Dream
  type: MusicAlbum
  date published: 2024-08-21
album: Sand
  type: MusicAlbum
  date published: 2024-11-08
album: Unstoppable
  type: MusicAlbum
  date published: 2025-01-10
  track: Unstoppable
    type: MusicRecording
    duration: PT2M36S
    duration ms: 156321
    explicit: false
    by artist: Lefteris Ioannou
    in album: Unstoppable
      type: MusicAlbum
      date published: 2025-01-10
    isrc code: QZZ7V2417211
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T14:58:00+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xc675c3f10d08161ef770d8298aae1d764d494cb607e1720e49e94790ab0079ed
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958567
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958567
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7V2417211
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T15:22:40Z
    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 0xc675c3f10d08161ef770d8298aae1d764d494cb607e1720e49e94790ab0079ed. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZZ7V2417211.
      date published: 2026-07-18T15:22:40Z
    audio: Unstoppable
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 121.029
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.435
      additional property: Energy
        type: PropertyValue
        value: 0.434
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.735
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.87
      additional property: Liveness
        type: PropertyValue
        value: 0.115
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.047
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.031
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Ionian Waltz
  type: MusicAlbum
  date published: 2025-05-02
album: The Promise
  type: MusicAlbum
  date published: 2025-06-20