Polyák Lazar
type: MusicGroup
genre: lullaby
popularity: 27
followers: 93
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0a5390eef8f90c76711ca83fbee0e582023212ecf9ea42a21b3c15135e0cc567
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/01f6a3b5-a0fc-484a-a595-0a64190225dd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/01f6a3b5-a0fc-484a-a595-0a64190225dd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/01f6a3b5-a0fc-484a-a595-0a64190225dd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0a5390eef8f90c76711ca83fbee0e582023212ecf9ea42a21b3c15135e0cc567","name":"Polyák Lazar","registered_at":"2026-06-11T10:44:03Z","symbol":"NIM0003161","token_address":"0x1b45a422909e781c038a237522cb6e78df5e33f1","type":"artist","uuid":"01f6a3b5-a0fc-484a-a595-0a64190225dd"}
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 0x0a5390eef8f90c76711ca83fbee0e582023212ecf9ea42a21b3c15135e0cc567. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01f6a3b5-a0fc-484a-a595-0a64190225dd.json and https://artists.proofprofile.net/proofs/artist/01f6a3b5-a0fc-484a-a595-0a64190225dd.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x0a5390eef8f90c76711ca83fbee0e582023212ecf9ea42a21b3c15135e0cc567","name":"Polyák Lazar","registered_at":"2026-06-11T10:44:03Z","symbol":"NIM0003161","token_address":"0x1b45a422909e781c038a237522cb6e78df5e33f1","type":"artist","uuid":"01f6a3b5-a0fc-484a-a595-0a64190225dd"}
album: Sleepy Time Piano
  type: MusicAlbum
  date published: 2026-08-14
track: The Muffin Man
  type: MusicRecording
  duration: PT1M6S
  duration ms: 66000
  explicit: false
  by artist: Polyák Lazar
  in album: Humpty Dumpty
    type: MusicAlbum
    date published: 2020-03-27
  genre: lullaby
  isrc code: SE5W32050202
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T03:10:49+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xdc7e0b2700e2594be803d1fd9995401ceda41e7e553c7696b70d5cf7f6fda060
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956474
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956474
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5W32050202
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-03T08:56:35Z
  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 0xdc7e0b2700e2594be803d1fd9995401ceda41e7e553c7696b70d5cf7f6fda060. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5W32050202 — a six-check JSON result.
    date published: 2026-07-03T08:56:35Z
  audio: The Muffin Man
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 78.886
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.434
    additional property: Energy
      type: PropertyValue
      value: 0.032
    additional property: Speechiness
      type: PropertyValue
      value: 0.047
    additional property: Acousticness
      type: PropertyValue
      value: 0.995
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.972
    additional property: Liveness
      type: PropertyValue
      value: 0.119
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.666
    additional property: Loudness (dB)
      type: PropertyValue
      value: -26.629
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Humpty Dumpty
  type: MusicRecording
  duration: PT1M7S
  duration ms: 67000
  explicit: false
  by artist: Polyák Lazar
  in album: Humpty Dumpty
    type: MusicAlbum
    date published: 2020-03-27
  genre: lullaby
  isrc code: SE5W32050201
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-15T15:36:39+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x7f87b62163f1b96292f1170432db03f4e13e2497a7db53127c1ef9540d3dddef
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958166
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958166
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5W32050201
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-15T15:55:19Z
  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 0x7f87b62163f1b96292f1170432db03f4e13e2497a7db53127c1ef9540d3dddef. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE5W32050201 — a six-check JSON result.
    date published: 2026-07-15T15:55:19Z
  audio: Humpty Dumpty
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 117.082
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.346
    additional property: Energy
      type: PropertyValue
      value: 0.044
    additional property: Speechiness
      type: PropertyValue
      value: 0.068
    additional property: Acousticness
      type: PropertyValue
      value: 0.991
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.961
    additional property: Liveness
      type: PropertyValue
      value: 0.211
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name
track: Waiting For Mommy

Valence (Positivity)
type: PropertyValue
value: 0.358

Loudness (dB)
type: PropertyValue
value: -28.073

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major

Waiting For Mommy
type: MusicRecording
duration: PT1M43S
duration ms: 103000
explicit: false
by artist: Polyák Lazar
in album: Waiting For Mommy
  type: MusicAlbum
  date published: 2022-06-10
genre: lullaby
isrc code: SE5W32201980
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-20T16:26:10+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf34aefcbbd2691079e8c9bda7a7a7d0e5ba82b0ea72bc11474d04bc0cb1e9faa
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958911
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958911
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5W32201980
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-20T16:46:31Z
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 0xf34aefcbbd2691079e8c9bda7a7a7d0e5ba82b0ea72bc11474d04bc0cb1e9faa. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/SE5W32201980 — a six-check JSON result.
  date published: 2026-07-20T16:46:31Z
audio: Waiting For Mommy
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 61.311
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.564
  additional property: Energy
    type: PropertyValue
    value: 0.067
  additional property: Speechiness
    type: PropertyValue
    value: 0.079
  additional property: Acousticness
    type: PropertyValue
    value: 0.995
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.972
  additional property: Liveness
    type: PropertyValue
    value: 0.109
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.707
  additional property: Loudness (dB)
    type: PropertyValue
    value: -29.863
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major