Martha Blackburn
type: MusicGroup
genre: lullaby
popularity: 47
followers: 1686
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfc2d2768ebbffc4b5090f0f4d7d2a75aec738445c22e98c8f138f568fd989cde
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b83eb25d-add1-4d2b-9da9-04ffa1fdb26e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b83eb25d-add1-4d2b-9da9-04ffa1fdb26e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b83eb25d-add1-4d2b-9da9-04ffa1fdb26e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfc2d2768ebbffc4b5090f0f4d7d2a75aec738445c22e98c8f138f568fd989cde","name":"Martha Blackburn","registered_at":"2026-06-12T08:12:18Z","symbol":"NIM0238466","token_address":"0xfa6f9847bf3f7fe47b330969feaa52a4ea5430a4","type":"artist","uuid":"b83eb25d-add1-4d2b-9da9-04ffa1fdb26e"}
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 0xfc2d2768ebbffc4b5090f0f4d7d2a75aec738445c22e98c8f138f568fd989cde. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b83eb25d-add1-4d2b-9da9-04ffa1fdb26e.json and https://artists.proofprofile.net/proofs/artist/b83eb25d-add1-4d2b-9da9-04ffa1fdb26e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xfc2d2768ebbffc4b5090f0f4d7d2a75aec738445c22e98c8f138f568fd989cde","name":"Martha Blackburn","registered_at":"2026-06-12T08:12:18Z","symbol":"NIM0238466","token_address":"0xfa6f9847bf3f7fe47b330969feaa52a4ea5430a4","type":"artist","uuid":"b83eb25d-add1-4d2b-9da9-04ffa1fdb26e"}
album: Head, Shoulders, Knees and Toes
  type: MusicAlbum
  date published: 2020-02-10
album: Head, Shoulders, Knees and Toes
  type: MusicAlbum
  date published: 2020-02-10
album: A Quiet Smile
  type: MusicAlbum
  date published: 2023-09-03
  track: A Quiet Smile
    type: MusicRecording
    duration: PT2M39S
    duration ms: 159454
    explicit: false
    by artist: Martha Blackburn
    in album: A Quiet Smile
      type: MusicAlbum
      date published: 2023-09-03
    genre: lullaby
    isrc code: QZAKB2351055
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T01:30:40+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x70577469a2b1085d83cd5a5b27ee3d6c36505ee245bfa49b43c534a8cf2a17c3
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958228
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958228
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2351055
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T02:46:47Z
    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 0x70577469a2b1085d83cd5a5b27ee3d6c36505ee245bfa49b43c534a8cf2a17c3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZAKB2351055.
      date published: 2026-07-16T02:46:47Z
    audio: A Quiet Smile
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 76.735
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.6
      additional property: Energy
        type: PropertyValue
        value: 0.019
      additional property: Speechiness
        type: PropertyValue
        value: 0.054
      additional property: Acousticness
        type: PropertyValue
        value: 0.996
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.949
      additional property: Liveness
        type: PropertyValue
        value: 0.063
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.35
      additional property: Loudness (dB)
        type: PropertyValue
        value: -33.896
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Corazón y Alma
  type: MusicAlbum
  date published: 2025-01-03
album: Es hora de descansar
  type: MusicAlbum
  date published: 2025-01-03