Katerina Papoutsaki
type: MusicGroup
genre: entehno
popularity: 10
followers: 1437
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd256e4b156f55431031d8b434cbdfab1fb26e276854ab4a65315c874c0e3fc15
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954549
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954549
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a8630f30-393b-4598-a055-0272d19d878a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a8630f30-393b-4598-a055-0272d19d878a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a8630f30-393b-4598-a055-0272d19d878a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd256e4b156f55431031d8b434cbdfab1fb26e276854ab4a65315c874c0e3fc15","name":"Katerina Papoutsaki","registered_at":"2026-06-20T08:35:53Z","symbol":"NIM1566823","token_address":"0x8084e4b2f50664e93c8a1bf16e2520e792e996af","type":"artist","uuid":"a8630f30-393b-4598-a055-0272d19d878a"}
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 0xd256e4b156f55431031d8b434cbdfab1fb26e276854ab4a65315c874c0e3fc15. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8630f30-393b-4598-a055-0272d19d878a.json and https://artists.proofprofile.net/proofs/artist/a8630f30-393b-4598-a055-0272d19d878a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T10:56:20Z
  text: {"copyright_id":"0xd256e4b156f55431031d8b434cbdfab1fb26e276854ab4a65315c874c0e3fc15","name":"Katerina Papoutsaki","registered_at":"2026-06-20T08:35:53Z","symbol":"NIM1566823","token_address":"0x8084e4b2f50664e93c8a1bf16e2520e792e996af","type":"artist","uuid":"a8630f30-393b-4598-a055-0272d19d878a"}
album: Dipla Mou
  type: MusicAlbum
  date published: 2019-02-18
album: Sklava
  type: MusicAlbum
  date published: 2021-05-24
album: Petalouda
  type: MusicAlbum
  date published: 2021-10-29
album: Adespoto Skyli
  type: MusicAlbum
  date published: 2022-05-13
album: Κalokairia
  type: MusicAlbum
  date published: 2022-07-14
album: Louloudaki
  type: MusicAlbum
  date published: 2023-07-07
  track: Louloudaki
    type: MusicRecording
    duration: PT3M35S
    duration ms: 215936
    explicit: false
    by artist: Katerina Papoutsaki
    in album: Louloudaki
      type: MusicAlbum
      date published: 2023-07-07
    genre: entehno
    isrc code: QM7282385980
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T17:00:07+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xfa989cbb3fb40e46099916fde0836bfb68f048f805139a10eb7ab14987c2083a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958444
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958444
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7282385980
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T19:12:23Z
    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 0xfa989cbb3fb40e46099916fde0836bfb68f048f805139a10eb7ab14987c2083a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM7282385980.
      date published: 2026-07-17T19:12:23Z
    audio: Louloudaki
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 101.366
      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: 0.642
      additional property: Energy
        type: PropertyValue
        value: 0.422
      additional property: Speechiness
        type: PropertyValue
        value: 0.036
      additional property: Acousticness
        type: PropertyValue
        value: 0.613
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.449
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.403
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.322
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Minor