Arcana Opera
type: MusicGroup
genre: folk metal
genre: symphonic metal
popularity: 7
followers: 1798
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xac3d07e80cc0a08c0632b54f8da0c70adcd7df6f3b4e672d7399420d83b60268
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8a93a17e-bcf8-4fbc-8c3d-5462e3ba4b98.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8a93a17e-bcf8-4fbc-8c3d-5462e3ba4b98.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8a93a17e-bcf8-4fbc-8c3d-5462e3ba4b98
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xac3d07e80cc0a08c0632b54f8da0c70adcd7df6f3b4e672d7399420d83b60268","name":"Arcana Opera","registered_at":"2026-06-17T14:22:36Z","symbol":"NIM1422737","token_address":"0xa470962d3218645fd0977dd8eb1bd9c902b5e3d9","type":"artist","uuid":"8a93a17e-bcf8-4fbc-8c3d-5462e3ba4b98"}
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 0xac3d07e80cc0a08c0632b54f8da0c70adcd7df6f3b4e672d7399420d83b60268. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a93a17e-bcf8-4fbc-8c3d-5462e3ba4b98.json and https://artists.proofprofile.net/proofs/artist/8a93a17e-bcf8-4fbc-8c3d-5462e3ba4b98.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0xac3d07e80cc0a08c0632b54f8da0c70adcd7df6f3b4e672d7399420d83b60268","name":"Arcana Opera","registered_at":"2026-06-17T14:22:36Z","symbol":"NIM1422737","token_address":"0xa470962d3218645fd0977dd8eb1bd9c902b5e3d9","type":"artist","uuid":"8a93a17e-bcf8-4fbc-8c3d-5462e3ba4b98"}
album: De noir
  type: MusicAlbum
  date published: 2015-06-20
  track: La tesi dI Empedocle
    type: MusicRecording
    duration: PT5M1S
    duration ms: 301978
    explicit: false
    by artist: Arcana Opera
    in album: De noir
      type: MusicAlbum
      date published: 2015-06-20
    genre: folk metal
    genre: symphonic metal
    isrc code: IEJNG1400201
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T22:55:08+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6adc169feb4b854265742bec5357d3ab369e01b15fb692100f47491a76030b71
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958489
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958489
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/IEJNG1400201
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T04:13:26Z
    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 0x6adc169feb4b854265742bec5357d3ab369e01b15fb692100f47491a76030b71. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/IEJNG1400201.
      date published: 2026-07-18T04:13:26Z
    audio: La tesi dI Empedocle
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 126.027
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.558
      additional property: Energy
        type: PropertyValue
        value: 0.9
      additional property: Speechiness
        type: PropertyValue
        value: 0.045
      additional property: Acousticness
        type: PropertyValue
        value: 0.003
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.001
      additional property: Liveness
        type: PropertyValue
        value: 0.341
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.424
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.278
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: L'Orso
  type: MusicAlbum
  date published: 2019-07-26
album: L'orizzonte degli eventi
  type: MusicAlbum
  date published: 2023-10-27