Yury Martynov
type: MusicGroup
genre: classical piano
popularity: 4
followers: 333
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additional property: CopyrightChainExplorerURL
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910a058bbdf4ebb8d35f8c06819f33fb2f1afe471b204695ce2fa61f8a03ba21. Chain 2 (Bitcoin): anchored in block 953871 (2026-06-16T01:46:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/074d21f4-e2aa-4197-8083-845322efd36c.json and https://artists.proofprofile.net/proofs/artist/074d21f4-e2aa-4197-8083-845322efd36c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T01:46:03Z
  text: {"copyright_id":"0x910a058bbdf4ebb8d35f8c06819f33fb2f1afe471b204695ce2fa61f8a03ba21","name":"Yury Martynov","registered_at":"2026-06-15T16:00:10Z","symbol":"NIM0758891","token_address":"0xf70583e0448e334fd0844d5ecbaa80308c21d599","type":"artist","uuid":"074d21f4-e2aa-4197-8083-845322efd36c"}
track: Sonata in D Major, K. 448: II. Andante

Sonata in D Major, K. 448: II. Andante
type: MusicRecording
duration: PT9M44S
duration ms: 584186
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Alexei Lubimov
by artist: Yury Martynov
in album: Mozart: Pieces for Two Fortepianos
  type: MusicAlbum
  date published: 2012-11-26
genre: classical
genre: classical-era
isrc code: FR1P71230602
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19+00:00
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
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  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
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  value: true
additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
  type: PropertyValue
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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2fdbdb1e86f016e577b535eeb8efcd38e73dda5b20652ca35771964d8982b1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR1P71230602.
  date published: 2026-07-08T08:56:20Z
audio: Sonata in D Major, K. 448: II. Andante
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Time Signature
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  additional property: Speechiness
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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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  additional property: Loudness (dB)
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  additional property: Key Name
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    value: F#
  additional property: Mode Name
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    value: Major