Duo.Hansen
type: MusicGroup
popularity: 16
followers: 479
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf98e57f403053fac2f1ce56872289091598fadaea742dcb454147fa09a31818b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953742
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953742
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/94717bf8-1265-4182-917e-e76e511c734b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/94717bf8-1265-4182-917e-e76e511c734b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/94717bf8-1265-4182-917e-e76e511c734b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T04:47:56Z
additional property: OTSCanonicalRecord
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 0xf98e57f403053fac2f1ce56872289091598fadaea742dcb454147fa09a31818b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94717bf8-1265-4182-917e-e76e511c734b.json and https://artists.proofprofile.net/proofs/artist/94717bf8-1265-4182-917e-e76e511c734b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T04:47:56Z
album: Greensleves (Violin and Cello)
  type: MusicAlbum
  date published: 2018-03-30
album: Stranger Things
  type: MusicAlbum
  date published: 2019-04-05
album: Sherlock BBC Main Theme / Irene's Theme
  type: MusicAlbum
  date published: 2019-04-05
  track: Sherlock BBC Main Theme / Irene's Theme
    type: MusicRecording
    duration: PT2M46S
    duration ms: 166874
    explicit: false
    by artist: Duo.Hansen
    in album: Sherlock BBC Main Theme / Irene's Theme
      type: MusicAlbum
      date published: 2019-04-05
    isrc code: USCGJ1989529
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T05:55:57+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa642fdb4b080141b259b2eae78e77c65f0d8a75cb4bab6772bed7a0f1953ecc8
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956639
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956639
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1989529
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T11:19:20Z
    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 0xa642fdb4b080141b259b2eae78e77c65f0d8a75cb4bab6772bed7a0f1953ecc8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGJ1989529.
      date published: 2026-07-04T11:19:20Z
    audio: Sherlock BBC Main Theme / Irene's Theme
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 97.12
      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: 0.25
      additional property: Energy
        type: PropertyValue
        value: 0.03
      additional property: Speechiness
        type: PropertyValue
        value: 0.044
      additional property: Acousticness
        type: PropertyValue
        value: 0.912
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.257
      additional property: Liveness
        type: PropertyValue
        value: 0.122
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.077
      additional property: Loudness (dB)
        type: PropertyValue
        value: -26.183
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: You're a Mean One, Mr. Grinch
  type: MusicAlbum
  date published: 2019-11-14
album: I See the Light
  type: MusicAlbum
  date published: 2020-09-18
album: Can You Feel the Love Tonight
  type: MusicAlbum
  date published: 2020-10-01
album: Arabian Nights
  type: MusicAlbum
  date published: 2020-10-09
album: May It Be
  type: MusicAlbum
  date published: 2020-10-16
album: What's This
  type: MusicAlbum
  date published: 2020-12-03