Marta Cook
type: MusicGroup
popularity: 5
followers: 4
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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  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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85f8aeb0d74e7969af09594344dc163e2e28afc31100764e8398ce644c0b5eb. 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/45429650-bc85-484a-87a2-a4992d524070.json and https://artists.proofprofile.net/proofs/artist/45429650-bc85-484a-87a2-a4992d524070.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0xc85f8aeb0d74e7969af09594344dc163e2e28afc31100764e8398ce644c0b5eb","name":"Marta Cook","registered_at":"2026-06-16T13:43:39Z","symbol":"NIM1069996","token_address":"0x7caa2eca24ae6f3723b25afdc27667ff28bedec2","type":"artist","uuid":"45429650-bc85-484a-87a2-a4992d524070"}
track: A Christmas Jig / Mouth of the Tobique Reel

A Christmas Jig / Mouth of the Tobique Reel
type: MusicRecording
duration: PT3M46S
duration ms: 226893
explicit: false
by artist: Yo-Yo Ma
by artist: Natalie MacMaster
by artist: Marta Cook
in album: Songs of Joy & Peace
  type: MusicAlbum
  date published: 2008-10-13
genre: classical-performance
genre: classical-cello
genre: chamber-ensemble
isrc code: USSM10802804
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additional property: CopyrightStatus
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
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additional property: BitcoinTime
  type: PropertyValue
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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbb091b089696b8bc76e5c805dc6ab3e3888e14b94e041230a3b9336c592572. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM10802804.
  date published: 2026-07-02T03:55:08Z
audio: A Christmas Jig / Mouth of the Tobique Reel
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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    value: 0.903
  additional property: Loudness (dB)
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    value: -15.322
  additional property: Key Name
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    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major