Maria Spyropoulou
type: MusicGroup
genre: entehno
popularity: 6
followers: 254
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf2b73ac77a28c6594a5bc91f7ddf26edd26c141630fd926ca8962a1ad3155753
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954131
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954131
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7ba12e71-8f70-470a-8b16-6ec8111e9277.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7ba12e71-8f70-470a-8b16-6ec8111e9277.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7ba12e71-8f70-470a-8b16-6ec8111e9277
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:19:19Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf2b73ac77a28c6594a5bc91f7ddf26edd26c141630fd926ca8962a1ad3155753","name":"Maria Spyropoulou","registered_at":"2026-06-17T08:41:14Z","symbol":"NIM1341398","token_address":"0xf0b5d55d10c035c767d59e8329852281afd04f24","type":"artist","uuid":"7ba12e71-8f70-470a-8b16-6ec8111e9277"}
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 0xf2b73ac77a28c6594a5bc91f7ddf26edd26c141630fd926ca8962a1ad3155753. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ba12e71-8f70-470a-8b16-6ec8111e9277.json and https://artists.proofprofile.net/proofs/artist/7ba12e71-8f70-470a-8b16-6ec8111e9277.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:19:19Z
  text: {"copyright_id":"0xf2b73ac77a28c6594a5bc91f7ddf26edd26c141630fd926ca8962a1ad3155753","name":"Maria Spyropoulou","registered_at":"2026-06-17T08:41:14Z","symbol":"NIM1341398","token_address":"0xf0b5d55d10c035c767d59e8329852281afd04f24","type":"artist","uuid":"7ba12e71-8f70-470a-8b16-6ec8111e9277"}
album: Perimeno
  type: MusicAlbum
  date published: 2003-01-01
album: Perimeno
  type: MusicAlbum
  date published: 2003-01-01
  track: Aida
    type: MusicRecording
    duration: PT5M7S
    duration ms: 307213
    explicit: false
    by artist: Maria Spyropoulou
    in album: Perimeno
      type: MusicAlbum
      date published: 2003-01-01
    genre: entehno
    isrc code: FRX201912862
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T12:44:50+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x5e2d961ffdbec3048152c4f0bf85efd596c9000168a5cd3638be49c12e67f009
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958300
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958300
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX201912862
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T16:14:30Z
    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 0x5e2d961ffdbec3048152c4f0bf85efd596c9000168a5cd3638be49c12e67f009. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX201912862.
      date published: 2026-07-16T16:14:30Z
    audio: Aida
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 91.969
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.485
      additional property: Energy
        type: PropertyValue
        value: 0.682
      additional property: Speechiness
        type: PropertyValue
        value: 0.086
      additional property: Acousticness
        type: PropertyValue
        value: 0.317
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.025
      additional property: Liveness
        type: PropertyValue
        value: 0.103
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.879
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.858
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Gia To Hatiri Mias Agapis
  type: MusicAlbum
  date published: 2005-01-01
album: I Limni Ton Stenagmon (I Mousiki Tis Seiras Tou Alter)
  type: MusicAlbum
  date published: 2005-01-01
album: Ligo Akoma
  type: MusicAlbum
  date published: 2015-07-09
album: Gia To Hatiri Mias Agapis
  type: MusicAlbum
  date published: 2019-08-02