Alexandr Leonov
type: MusicGroup
genre: deep house
genre: nu disco
popularity: 3
followers: 78
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb10a4cc8003d1930880cdf63aea01b2831cabe0cf5f6e0f48793f0b9ede04615
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953996
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953996
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2fa0c87a-9e17-4dea-bb47-b0e44226dd3f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2fa0c87a-9e17-4dea-bb47-b0e44226dd3f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2fa0c87a-9e17-4dea-bb47-b0e44226dd3f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:04:35Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb10a4cc8003d1930880cdf63aea01b2831cabe0cf5f6e0f48793f0b9ede04615","name":"Alexandr Leonov","registered_at":"2026-06-16T06:10:08Z","symbol":"NIM0961776","token_address":"0xfb00cd476c3d977f1aee3796f6277424385a01b6","type":"artist","uuid":"2fa0c87a-9e17-4dea-bb47-b0e44226dd3f"}
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 0xb10a4cc8003d1930880cdf63aea01b2831cabe0cf5f6e0f48793f0b9ede04615. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2fa0c87a-9e17-4dea-bb47-b0e44226dd3f.json and https://artists.proofprofile.net/proofs/artist/2fa0c87a-9e17-4dea-bb47-b0e44226dd3f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T20:04:35Z
  text: {"copyright_id":"0xb10a4cc8003d1930880cdf63aea01b2831cabe0cf5f6e0f48793f0b9ede04615","name":"Alexandr Leonov","registered_at":"2026-06-16T06:10:08Z","symbol":"NIM0961776","token_address":"0xfb00cd476c3d977f1aee3796f6277424385a01b6","type":"artist","uuid":"2fa0c87a-9e17-4dea-bb47-b0e44226dd3f"}
album: So Good
  type: MusicAlbum
  date published: 2018-11-03
album: Tomorrow
  type: MusicAlbum
  date published: 2019-05-06
album: Lie Machine
  type: MusicAlbum
  date published: 2019-11-27
album: Soul Say
  type: MusicAlbum
  date published: 2020-11-17
album: Hush
  type: MusicAlbum
  date published: 2022-04-18
album: Day
  type: MusicAlbum
  date published: 2022-06-20
album: Gates of Perfection
  type: MusicAlbum
  date published: 2022-12-17
album: Again
  type: MusicAlbum
  date published: 2023-09-05
album: Inside of Me
  type: MusicAlbum
  date published: 2023-09-15
album: The One I Want
  type: MusicAlbum
  date published: 2024-03-04
album: My Letter
  type: MusicAlbum
  date published: 2024-04-08
album: My Letter
  type: MusicAlbum
  date published: 2024-04-08
album: Shine
  type: MusicAlbum
  date published: 2024-06-12
album: I'll Save It
  type: MusicAlbum
  date published: 2025-03-24
track: My Letter
  type: MusicRecording
  duration: PT3M24S
  duration ms: 204226
  explicit: false
  by artist: Papa Tin
  by artist: Alexandr Leonov
  in album: My Letter
    type: MusicAlbum
    date published: 2025-05-19
  genre: deep-house
  genre: nu-disco
  genre: indie-dance
  isrc code: TCAJC2435768
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-30T15:48:44+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf21a87a539a1a2bf04e42784d072e5334cc5c3a168d0bdef3aa67a9592522316
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960276
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960276
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJC2435768
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T16:01:17Z
  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 0xf21a87a539a1a2bf04e42784d072e5334cc5c3a168d0bdef3aa67a9592522316. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/TCAJC2435768 — a six-check JSON result.
    date published: 2026-07-30T16:01:17Z
  audio: My Letter
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 131.618
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.727
    additional property: Energy
      type: PropertyValue
      value: 0.881
    additional property: Speechiness
      type: PropertyValue
      value: 0.036
    additional property: Acousticness
      type: PropertyValue
      value: 0.055
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.039
    additional property: Liveness
      type: PropertyValue
      value: 0.167
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.249
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.63
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: My Letter - Extended Mix
  type: MusicRecording
  duration: PT5M12S
  duration ms: 312006
  explicit: false
  by artist: Papa Tin
  by artist: Alexandr Leonov
  in album: My Letter
    type: MusicAlbum
    date published: 2025-05-19
  genre: deep-house
  genre: nu-disco
  genre: indie-dance
  isrc code: TCAJC2435777
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-22T21:26:34+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x09529af3268388270cb227a73391a5700f61152178b09bf1e282ae9e678825f6
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: My Letter - Extended Mix

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJC2435777

OTSTimestamp
type: PropertyValue
value: 2026-07-02T03:55:08Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09529af3268388270cb227a73391a5700f61152178b09bf1e282ae9e678825f6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAJC2435777 — a six-check JSON result.
date published: 2026-07-02T03:55:08Z

My Letter - Extended Mix
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 131.617
additional property: Musical Key
  type: PropertyValue
  value: 5
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.792
additional property: Energy
  type: PropertyValue
  value: 0.874
additional property: Speechiness
  type: PropertyValue
  value: 0.05
additional property: Acousticness
  type: PropertyValue
  value: 0.002
additional property: Instrumentalness
  type: PropertyValue
  value: 0.197
additional property: Liveness
  type: PropertyValue
  value: 0.029
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.414
additional property: Loudness (dB)
  type: PropertyValue
  value: -10.41
additional property: Key Name
  type: PropertyValue
  value: F
additional property: Mode Name
  type: PropertyValue
  value: Major