Alexander Kostov
type: MusicGroup
popularity: 5
followers: 89
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe7f4c46216b83bd3c6e773c9cf179229eccf17feb76fbfb4c023fa10d90ce644
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a72468e3-3517-4001-ab50-375614d7705b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a72468e3-3517-4001-ab50-375614d7705b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a72468e3-3517-4001-ab50-375614d7705b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe7f4c46216b83bd3c6e773c9cf179229eccf17feb76fbfb4c023fa10d90ce644","name":"Alexander Kostov","registered_at":"2026-06-20T08:07:23Z","symbol":"NIM1561898","token_address":"0x51033d65035daaaab7619dfb7df06103793d2ae4","type":"artist","uuid":"a72468e3-3517-4001-ab50-375614d7705b"}
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 0xe7f4c46216b83bd3c6e773c9cf179229eccf17feb76fbfb4c023fa10d90ce644. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a72468e3-3517-4001-ab50-375614d7705b.json and https://artists.proofprofile.net/proofs/artist/a72468e3-3517-4001-ab50-375614d7705b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0xe7f4c46216b83bd3c6e773c9cf179229eccf17feb76fbfb4c023fa10d90ce644","name":"Alexander Kostov","registered_at":"2026-06-20T08:07:23Z","symbol":"NIM1561898","token_address":"0x51033d65035daaaab7619dfb7df06103793d2ae4","type":"artist","uuid":"a72468e3-3517-4001-ab50-375614d7705b"}
album: Songs of the Balkan
  type: MusicAlbum
  date published: 2018-09-19
album: Songs of the Balkan
  type: MusicAlbum
  date published: 2018-09-19
album: Letters from Antarctica (Original Motion Picture Soundtrack)
  type: MusicAlbum
  date published: 2019-10-21
album: Lifeslide (Original Game Soundtrack)
  type: MusicAlbum
  date published: 2021-08-13
album: Lifeslide (Original Game Soundtrack)
  type: MusicAlbum
  date published: 2021-08-13
album: Land of my Grandfathers
  type: MusicAlbum
  date published: 2022-03-15
album: War of the Instruments
  type: MusicAlbum
  date published: 2022-04-09
  track: It's My Time To Be Alive - Orchestral
    type: MusicRecording
    duration: PT3M3S
    duration ms: 183360
    explicit: false
    by artist: Alexander Kostov
    in album: War of the Instruments
      type: MusicAlbum
      date published: 2022-04-09
    isrc code: FRX282308765
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T22:03:40+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xbdb18ed57ed00951abe2560d14784901d1d179139055333654f84a00ddf66d8f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956728
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956728
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX282308765
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:43:49Z
    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 0xbdb18ed57ed00951abe2560d14784901d1d179139055333654f84a00ddf66d8f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRX282308765.
      date published: 2026-07-05T01:43:49Z
    audio: It's My Time To Be Alive - Orchestral
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 124.96
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.281
      additional property: Energy
        type: PropertyValue
        value: 0.516
      additional property: Speechiness
        type: PropertyValue
        value: 0.05
      additional property: Acousticness
        type: PropertyValue
        value: 0.276
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.313
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.211
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.318
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Songs of the Balkans
  type: MusicAlbum
  date published: 2023-04-06
album: Moments Like These
  type: MusicAlbum
  date published: 2024-08-01
album: I Can Be Free
  type: MusicAlbum
  date published: 2024-08-15
album: Before I Forget (Original Motion Picture Soundtrack)
  type: MusicAlbum
  date published: 2025-01-18
album: GIANTS: PLANT THE SEEDS OF GOOD (Original Motion Picture Soundtrack)
  type: MusicAlbum
  date published: 2025-05-09