А4
type: MusicGroup
popularity: 14
followers: 43735
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xae254e1e4e7ed0c432f399c5bbc14b86545b5bb49be21abb975c4947afb7f524
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953657
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953657
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4bbfe027-b6b6-49ac-8e65-ca8f1109eed7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4bbfe027-b6b6-49ac-8e65-ca8f1109eed7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4bbfe027-b6b6-49ac-8e65-ca8f1109eed7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T16:43:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xae254e1e4e7ed0c432f399c5bbc14b86545b5bb49be21abb975c4947afb7f524","name":"А4","registered_at":"2026-06-14T12:25:55Z","symbol":"NIM0452414","token_address":"0x0ede5f56b0902c7ee835c6a7209dcd75839666de","type":"artist","uuid":"4bbfe027-b6b6-49ac-8e65-ca8f1109eed7"}
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 0xae254e1e4e7ed0c432f399c5bbc14b86545b5bb49be21abb975c4947afb7f524. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4bbfe027-b6b6-49ac-8e65-ca8f1109eed7.json and https://artists.proofprofile.net/proofs/artist/4bbfe027-b6b6-49ac-8e65-ca8f1109eed7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T16:43:25Z
  text: {"copyright_id":"0xae254e1e4e7ed0c432f399c5bbc14b86545b5bb49be21abb975c4947afb7f524","name":"А4","registered_at":"2026-06-14T12:25:55Z","symbol":"NIM0452414","token_address":"0x0ede5f56b0902c7ee835c6a7209dcd75839666de","type":"artist","uuid":"4bbfe027-b6b6-49ac-8e65-ca8f1109eed7"}
album: Офишлбывший
  type: MusicAlbum
  date published: 2019-08-09
album: Песня про осень
  type: MusicAlbum
  date published: 2019-09-28
  track: Песня про осень
    type: MusicRecording
    duration: PT3M49S
    duration ms: 229009
    explicit: false
    by artist: А4
    in album: Песня про осень
      type: MusicAlbum
      date published: 2019-09-28
    isrc code: QM7281993153
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T12:26:11+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf1ebb99c22a042afc0bffeaf722f695b6a21a847cba2180f9c6e0c4d85e04668
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958547
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958547
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281993153
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T12:44:05Z
    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 0xf1ebb99c22a042afc0bffeaf722f695b6a21a847cba2180f9c6e0c4d85e04668. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM7281993153.
      date published: 2026-07-18T12:44:05Z
    audio: Песня про осень
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 130.04
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.872
      additional property: Energy
        type: PropertyValue
        value: 0.672
      additional property: Speechiness
        type: PropertyValue
        value: 0.108
      additional property: Acousticness
        type: PropertyValue
        value: 0.069
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.08
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.666
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.316
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: ДЕТСКИЕ ПЕСНИ
  type: MusicAlbum
  date published: 2020-09-26
album: Kids (Phonk Remix)
  type: MusicAlbum
  date published: 2020-10-01