Markus Lehtsalu
type: MusicGroup
popularity: 6
followers: 306
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3b379a791b101cd5bf6b0013617b09644fa3c488d000cc119e1d399c10e289de
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954615
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954615
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c4dada14-d337-4cb2-a78d-00aacb448539.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c4dada14-d337-4cb2-a78d-00aacb448539.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c4dada14-d337-4cb2-a78d-00aacb448539
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T22:44:50Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3b379a791b101cd5bf6b0013617b09644fa3c488d000cc119e1d399c10e289de","name":"Markus Lehtsalu","registered_at":"2026-06-20T20:41:54Z","symbol":"NIM1708923","token_address":"0xc0fdd8ff3d6d21e80bac815b6c4a134344bd4dd6","type":"artist","uuid":"c4dada14-d337-4cb2-a78d-00aacb448539"}
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 0x3b379a791b101cd5bf6b0013617b09644fa3c488d000cc119e1d399c10e289de. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4dada14-d337-4cb2-a78d-00aacb448539.json and https://artists.proofprofile.net/proofs/artist/c4dada14-d337-4cb2-a78d-00aacb448539.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T22:44:50Z
  text: {"copyright_id":"0x3b379a791b101cd5bf6b0013617b09644fa3c488d000cc119e1d399c10e289de","name":"Markus Lehtsalu","registered_at":"2026-06-20T20:41:54Z","symbol":"NIM1708923","token_address":"0xc0fdd8ff3d6d21e80bac815b6c4a134344bd4dd6","type":"artist","uuid":"c4dada14-d337-4cb2-a78d-00aacb448539"}
album: Kuristik
  type: MusicAlbum
  date published: 2018-12-06
album: Dust Off My Shoulders
  type: MusicAlbum
  date published: 2020-04-11
album: Fell-In
  type: MusicAlbum
  date published: 2020-11-23
album: Sammal
  type: MusicAlbum
  date published: 2020-11-23
album: Mõnitajalind
  type: MusicAlbum
  date published: 2021-05-09
album: Kuraditosinamees
  type: MusicAlbum
  date published: 2021-06-02
album: JE SUIS A TOI
  type: MusicAlbum
  date published: 2021-12-24
album: sinikad
  type: MusicAlbum
  date published: 2022-06-17
  track: sinikad
    type: MusicRecording
    duration: PT5M0S
    duration ms: 300000
    explicit: false
    by artist: Markus Lehtsalu
    in album: sinikad
      type: MusicAlbum
      date published: 2022-06-17
    isrc code: QZMHN2286620
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T05:49:18+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf7237f51d294267b4521311daac67bae40a89976df2fe676f846b8c0faf3292b
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958977
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958977
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHN2286620
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T08:50:20Z
    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 0xf7237f51d294267b4521311daac67bae40a89976df2fe676f846b8c0faf3292b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:50:20Z), 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/QZMHN2286620.
      date published: 2026-07-21T08:50:20Z
    audio: sinikad
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 98.531
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.615
      additional property: Energy
        type: PropertyValue
        value: 0.518
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.329
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.002
      additional property: Liveness
        type: PropertyValue
        value: 0.091
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.343
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.096
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Kuningboa
  type: MusicAlbum
  date published: 2022-08-05
album: Island
  type: MusicAlbum
  date published: 2022-08-12
album: Robert De Niro
  type: MusicAlbum
  date published: 2022-08-19
album: Kunstnik
  type: MusicAlbum
  date published: 2022-08-26
album: Nurkademäng
  type: MusicAlbum
  date published: 2022-09-02
album: Nihvernaadi
  type: MusicAlbum
  date published: 2022-09-09
album: AMANDA
  type: MusicAlbum
  date published: 2023-04-19
album: su pärast põlesin ma pikki öid
  type: MusicAlbum
  date published: 2024-05-31
album: karikakar
  type: MusicAlbum
  date published: 2024-06-30
album: Valgred j6ulud
  type: MusicAlbum
  date published: 2024-07-15
album: muusika
  type: MusicAlbum
  date published: 2024-07-31
album: koidikuni
  type: MusicAlbum
  date published: 2024-10-25
album: sahver
  type: MusicAlbum
  date published: 2025-08-22
album: Korduma Kippuv Küsimus
  type: MusicAlbum
  date published: 2025-11-12