Dmitri Cogan
type: MusicGroup
popularity: 6
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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 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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c210911735f12e21b57347281a52b1182b90e5d6eddcd369ed2e4510ac3a1bf. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94c6909b-cbef-4d4f-8c45-5eb72f701514.json and https://artists.proofprofile.net/proofs/artist/94c6909b-cbef-4d4f-8c45-5eb72f701514.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0x9c210911735f12e21b57347281a52b1182b90e5d6eddcd369ed2e4510ac3a1bf","name":"Dmitri Cogan","registered_at":"2026-06-17T17:20:40Z","symbol":"NIM1465243","token_address":"0xbfdd162b85311b746a9aef880f7217ab1b1b1a96","type":"artist","uuid":"94c6909b-cbef-4d4f-8c45-5eb72f701514"}
track: Prokofiev / Arr. Markov: Peter and the Wolf, Op. 67 (Excerpt)
  type: MusicRecording
  duration: PT3M36S
  duration ms: 216066
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  by artist: Sergei Prokofiev
  by artist: Alexander Markov
  by artist: Dmitri Cogan
  in album: 40 Most Beautiful Violin Classics
    type: MusicAlbum
    date published: 2011-07-05
  genre: classical
  genre: orchestra
  genre: neoclassical
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  additional property: OTSVerificationAPI
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    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ209300100
  additional property: OTSTimestamp
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    value: 2026-07-02T03:30:09Z
  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 0xf00f23d012808f8628942ca85c621b36871c0870b9f4c35fa0dbc6a535e83e66. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRZ209300100.
    date published: 2026-07-02T03:30:09Z
  audio: Prokofiev / Arr. Markov: Peter and the Wolf, Op. 67 (Excerpt)
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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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