Матвей Князев
type: MusicGroup
popularity: 4
followers: 60
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8573ea06bc8dc942c02b4e67d2389e88687c9d271cf1179b45a580a7348e53f4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953877
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953877
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/08ea93bb-d181-471c-a58b-2ee3df7ca62b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/08ea93bb-d181-471c-a58b-2ee3df7ca62b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/08ea93bb-d181-471c-a58b-2ee3df7ca62b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T02:39:16Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8573ea06bc8dc942c02b4e67d2389e88687c9d271cf1179b45a580a7348e53f4","name":"Матвей Князев","registered_at":"2026-06-15T16:37:23Z","symbol":"NIM0767776","token_address":"0xff060adac99e81ea5ca8d2723aeb4a3559473e99","type":"artist","uuid":"08ea93bb-d181-471c-a58b-2ee3df7ca62b"}
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 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 0x8573ea06bc8dc942c02b4e67d2389e88687c9d271cf1179b45a580a7348e53f4. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08ea93bb-d181-471c-a58b-2ee3df7ca62b.json and https://artists.proofprofile.net/proofs/artist/08ea93bb-d181-471c-a58b-2ee3df7ca62b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T02:39:16Z
  text: {"copyright_id":"0x8573ea06bc8dc942c02b4e67d2389e88687c9d271cf1179b45a580a7348e53f4","name":"Матвей Князев","registered_at":"2026-06-15T16:37:23Z","symbol":"NIM0767776","token_address":"0xff060adac99e81ea5ca8d2723aeb4a3559473e99","type":"artist","uuid":"08ea93bb-d181-471c-a58b-2ee3df7ca62b"}
album: О чистой любви
  type: MusicAlbum
  date published: 2017-03-02
album: Чума
  type: MusicAlbum
  date published: 2019-10-01
album: Космосом
  type: MusicAlbum
  date published: 2020-03-22
  track: Космосом
    type: MusicRecording
    duration: PT2M25S
    duration ms: 145434
    explicit: false
    by artist: Матвей Князев
    in album: Космосом
      type: MusicAlbum
      date published: 2020-03-22
    isrc code: QZGLM2066221
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T16:47:43+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x99ee3f7e9703b64f2ab662e435a17299724ba5f028106069e1893c023b9fdec5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958585
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958585
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2066221
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T17:05:16Z
    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 0x99ee3f7e9703b64f2ab662e435a17299724ba5f028106069e1893c023b9fdec5. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2066221 — a six-check JSON result.
      date published: 2026-07-18T17:05:16Z
    audio: Космосом
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 91.802
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.736
      additional property: Energy
        type: PropertyValue
        value: 0.551
      additional property: Speechiness
        type: PropertyValue
        value: 0.075
      additional property: Acousticness
        type: PropertyValue
        value: 0.461
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.272
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.542
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.646
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Космосом
  type: MusicAlbum
  date published: 2020-03-22
album: А ты улыбаешься
  type: MusicAlbum
  date published: 2021-01-10
album: Научить тебя жить?
  type: MusicAlbum
  date published: 2023-08-24
album: Мотылёк
  type: MusicAlbum
  date published: 2024-09-15
album: Возьми
  type: MusicAlbum
  date published: 2025-05-16