Mariel Roberts
type: MusicGroup
genre: avant-garde
genre: drone
popularity: 2
followers: 359
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x650b2ec490b6d8e064ff91b4482eac87176f2e321497c070bcb314313f6a6717
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b808aea3-53b2-4745-9543-b38a9cb210e9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b808aea3-53b2-4745-9543-b38a9cb210e9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b808aea3-53b2-4745-9543-b38a9cb210e9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x650b2ec490b6d8e064ff91b4482eac87176f2e321497c070bcb314313f6a6717","name":"Mariel Roberts","registered_at":"2026-06-20T15:57:00Z","symbol":"NIM1646851","token_address":"0xbc19b5323e126dd4d01d78834cb391e240871fc8","type":"artist","uuid":"b808aea3-53b2-4745-9543-b38a9cb210e9"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650b2ec490b6d8e064ff91b4482eac87176f2e321497c070bcb314313f6a6717. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b808aea3-53b2-4745-9543-b38a9cb210e9.json and https://artists.proofprofile.net/proofs/artist/b808aea3-53b2-4745-9543-b38a9cb210e9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x650b2ec490b6d8e064ff91b4482eac87176f2e321497c070bcb314313f6a6717","name":"Mariel Roberts","registered_at":"2026-06-20T15:57:00Z","symbol":"NIM1646851","token_address":"0xbc19b5323e126dd4d01d78834cb391e240871fc8","type":"artist","uuid":"b808aea3-53b2-4745-9543-b38a9cb210e9"}
album: Nonextraneous Sounds
  type: MusicAlbum
  date published: 2012-09-04
album: Nonextraneous Sounds
  type: MusicAlbum
  date published: 2012-09-04
album: Cartography
  type: MusicAlbum
  date published: 2017-05-19
album: Cartography
  type: MusicAlbum
  date published: 2017-05-19
album: Armament
  type: MusicAlbum
  date published: 2021-02-05
track: 21
  type: MusicRecording
  duration: PT9M50S
  duration ms: 590049
  explicit: false
  by artist: Andy Akiho
  by artist: Mariel Roberts
  in album: No One to Know One
    type: MusicAlbum
    date published: 2022-07-15
  genre: chamber-music
  isrc code: QMEU32203395
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T05:03:44+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xa9cd82f2b1efd5616538d64a73f93fd3f7371370831390c30d78f1b736cd5cc7
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32203395
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cd82f2b1efd5616538d64a73f93fd3f7371370831390c30d78f1b736cd5cc7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32203395 — a six-check JSON result.
    date published: 2026-07-08T03:20:19Z
  audio: 21
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 111.263
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.611
    additional property: Energy
      type: PropertyValue
      value: 0.42
    additional property: Speechiness
      type: PropertyValue
      value: 0.038
    additional property: Acousticness
      type: PropertyValue
      value: 0.539
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.81
    additional property: Liveness
      type: PropertyValue
      value: 0.076
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.362
    additional property: Loudness (dB)
      type: PropertyValue
      value: -15.762
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Minor