Duo Ken
type: MusicGroup
popularity: 4
followers: 566
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8c713b0cab7bb5a20b567c22544853352a24ddfd239047b3c38b2f4b23520985
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/713a7e41-6fe0-4457-bfb2-125c81af753f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/713a7e41-6fe0-4457-bfb2-125c81af753f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/713a7e41-6fe0-4457-bfb2-125c81af753f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8c713b0cab7bb5a20b567c22544853352a24ddfd239047b3c38b2f4b23520985","name":"Duo Ken","registered_at":"2026-06-17T05:00:40Z","symbol":"NIM1288818","token_address":"0x9cdc1e123044a27e52348928fbba141f58de0152","type":"artist","uuid":"713a7e41-6fe0-4457-bfb2-125c81af753f"}
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 0x8c713b0cab7bb5a20b567c22544853352a24ddfd239047b3c38b2f4b23520985. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/713a7e41-6fe0-4457-bfb2-125c81af753f.json and https://artists.proofprofile.net/proofs/artist/713a7e41-6fe0-4457-bfb2-125c81af753f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x8c713b0cab7bb5a20b567c22544853352a24ddfd239047b3c38b2f4b23520985","name":"Duo Ken","registered_at":"2026-06-17T05:00:40Z","symbol":"NIM1288818","token_address":"0x9cdc1e123044a27e52348928fbba141f58de0152","type":"artist","uuid":"713a7e41-6fe0-4457-bfb2-125c81af753f"}
album: Il grande Mazinger (feat. Double Zero) [Mazinga]
  type: MusicAlbum
  date published: 2013-05-30
album: Cartoni alterati (feat. Double Zero) [Le più belle sigle dei cartoni animati anni 80 in versione rivisitata]
  type: MusicAlbum
  date published: 2013-07-01
  track: Carletto il principe dei mostri - Che paura mi fa!
    type: MusicRecording
    duration: PT3M16S
    duration ms: 196604
    explicit: false
    by artist: Duo Ken
    in album: Cartoni alterati (feat. Double Zero) [Le più belle sigle dei cartoni animati anni 80 in versione rivisitata]
      type: MusicAlbum
      date published: 2013-07-01
    isrc code: ITDC81300762
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T16:37:31+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xe391aa12970b5e7b2403eeba3f5e1c0bbfd578b240b684699256b2ec3aa467ea
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958913
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958913
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDC81300762
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T19:40:18Z
    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 0xe391aa12970b5e7b2403eeba3f5e1c0bbfd578b240b684699256b2ec3aa467ea. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:18Z), 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/ITDC81300762.
      date published: 2026-07-20T19:40:18Z
    audio: Carletto il principe dei mostri - Che paura mi fa!
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 158.177
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.518
      additional property: Energy
        type: PropertyValue
        value: 0.694
      additional property: Speechiness
        type: PropertyValue
        value: 0.059
      additional property: Acousticness
        type: PropertyValue
        value: 0.093
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.08
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.734
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.55
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Capitan Harlock (feat. Double Zero) [Original Soundtrack]
  type: MusicAlbum
  date published: 2013-12-30