Black Feather
type: MusicGroup
genre: norwegian pop
popularity: 5
followers: 520
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x11fb518dce40bac12897e0316e13223b1716c4649d467eb4aeeb899b3fc86b91
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f9ad5620-218a-4096-9ad3-08e81e8c8655.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f9ad5620-218a-4096-9ad3-08e81e8c8655.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f9ad5620-218a-4096-9ad3-08e81e8c8655
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x11fb518dce40bac12897e0316e13223b1716c4649d467eb4aeeb899b3fc86b91","name":"Black Feather","registered_at":"2026-06-21T16:36:10Z","symbol":"NIM1975152","token_address":"0x6855b4c43b674c7dda3b8254691e9fb59d39d3a9","type":"artist","uuid":"f9ad5620-218a-4096-9ad3-08e81e8c8655"}
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 0x11fb518dce40bac12897e0316e13223b1716c4649d467eb4aeeb899b3fc86b91. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9ad5620-218a-4096-9ad3-08e81e8c8655.json and https://artists.proofprofile.net/proofs/artist/f9ad5620-218a-4096-9ad3-08e81e8c8655.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x11fb518dce40bac12897e0316e13223b1716c4649d467eb4aeeb899b3fc86b91","name":"Black Feather","registered_at":"2026-06-21T16:36:10Z","symbol":"NIM1975152","token_address":"0x6855b4c43b674c7dda3b8254691e9fb59d39d3a9","type":"artist","uuid":"f9ad5620-218a-4096-9ad3-08e81e8c8655"}
album: Silhouette
  type: MusicAlbum
  date published: 2009-09-15
  track: Étienne de Silhouette
    type: MusicRecording
    duration: PT4M56S
    duration ms: 296626
    explicit: false
    by artist: Black Feather
    in album: Silhouette
      type: MusicAlbum
      date published: 2009-09-15
    genre: norwegian pop
    isrc code: USX540800129
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T13:08:30+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb313fcc2ba7243a8af9f3637299e6aa99800b8cd3788add6ed8fb20c8241eb06
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958157
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958157
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX540800129
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T16:07:35Z
    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 0xb313fcc2ba7243a8af9f3637299e6aa99800b8cd3788add6ed8fb20c8241eb06. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:35Z), 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/USX540800129.
      date published: 2026-07-15T16:07:35Z
    audio: Étienne de Silhouette
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 134.007
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.372
      additional property: Energy
        type: PropertyValue
        value: 0.483
      additional property: Speechiness
        type: PropertyValue
        value: 0.032
      additional property: Acousticness
        type: PropertyValue
        value: 0.003
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.191
      additional property: Liveness
        type: PropertyValue
        value: 0.11
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.251
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.32
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Minor