Marquis Ensemble
type: MusicGroup
genre: celtic
genre: new age
popularity: 8
followers: 44
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x29f4634c13b4a2efa454d4dac6c0de7be649757f210e5403a65aa581cbb49651
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/572252ec-2f48-4a4f-8c1d-592948717fc6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/572252ec-2f48-4a4f-8c1d-592948717fc6.json
additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/572252ec-2f48-4a4f-8c1d-592948717fc6
additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x29f4634c13b4a2efa454d4dac6c0de7be649757f210e5403a65aa581cbb49651","name":"Marquis Ensemble","registered_at":"2026-06-16T19:58:35Z","symbol":"NIM1159466","token_address":"0xcc8f384f296919df6608ef553f55c1b60dfd2a23","type":"artist","uuid":"572252ec-2f48-4a4f-8c1d-592948717fc6"}
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 0x29f4634c13b4a2efa454d4dac6c0de7be649757f210e5403a65aa581cbb49651. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/572252ec-2f48-4a4f-8c1d-592948717fc6.json and https://artists.proofprofile.net/proofs/artist/572252ec-2f48-4a4f-8c1d-592948717fc6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x29f4634c13b4a2efa454d4dac6c0de7be649757f210e5403a65aa581cbb49651","name":"Marquis Ensemble","registered_at":"2026-06-16T19:58:35Z","symbol":"NIM1159466","token_address":"0xcc8f384f296919df6608ef553f55c1b60dfd2a23","type":"artist","uuid":"572252ec-2f48-4a4f-8c1d-592948717fc6"}
album: Reflections from the Wine Country
  type: MusicAlbum
  date published: 2001-01-01
album: Reflections from the Wine Country
  type: MusicAlbum
  date published: 2001-05-15
  track: The Hills At Sunset
    type: MusicRecording
    duration: PT4M40S
    duration ms: 280546
    explicit: false
    by artist: Marquis Ensemble
    in album: Reflections from the Wine Country
      type: MusicAlbum
      date published: 2001-05-15
    genre: celtic
    genre: new age
    isrc code: USI4R0505077
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
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    additional property: CopyrightChainExplorerURL
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    additional property: OTSHash
    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957882
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0505077
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-13T16:48:10Z
    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 0xc677b07270a35bb1cfd22b85a9e602038a5eaa66707bf6526d9835cf5cb9c97d. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USI4R0505077.
      date published: 2026-07-13T16:48:10Z
    audio: The Hills At Sunset
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 93.995
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.519
      additional property: Energy
        type: PropertyValue
        value: 0.257
      additional property: Speechiness
        type: PropertyValue
        value: 0.027
      additional property: Acousticness
        type: PropertyValue
        value: 0.846
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.452
      additional property: Liveness
        type: PropertyValue
        value: 0.224
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.132
      additional property: Loudness (dB)
        type: PropertyValue
        value: -15.694
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major