Dawid Kajdan
type: MusicGroup
genre: disco polo
popularity: 6
followers: 152
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x838274ea581156f30a22bc056b83259bb3f9ba07e005c0f8d8fda1e6e1eb1f45
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8e7620df-a5a2-4da5-97f7-2a89d631145d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8e7620df-a5a2-4da5-97f7-2a89d631145d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8e7620df-a5a2-4da5-97f7-2a89d631145d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x838274ea581156f30a22bc056b83259bb3f9ba07e005c0f8d8fda1e6e1eb1f45","name":"Dawid Kajdan","registered_at":"2026-06-17T15:19:01Z","symbol":"NIM1436202","token_address":"0xfc2ac9d9e9662a93953f85f265e2b7414fe28ef2","type":"artist","uuid":"8e7620df-a5a2-4da5-97f7-2a89d631145d"}
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 0x838274ea581156f30a22bc056b83259bb3f9ba07e005c0f8d8fda1e6e1eb1f45. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e7620df-a5a2-4da5-97f7-2a89d631145d.json and https://artists.proofprofile.net/proofs/artist/8e7620df-a5a2-4da5-97f7-2a89d631145d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x838274ea581156f30a22bc056b83259bb3f9ba07e005c0f8d8fda1e6e1eb1f45","name":"Dawid Kajdan","registered_at":"2026-06-17T15:19:01Z","symbol":"NIM1436202","token_address":"0xfc2ac9d9e9662a93953f85f265e2b7414fe28ef2","type":"artist","uuid":"8e7620df-a5a2-4da5-97f7-2a89d631145d"}
album: Ta panna
  type: MusicAlbum
  date published: 2023-06-07
  track: Ta panna
    type: MusicRecording
    duration: PT2M58S
    duration ms: 178232
    explicit: false
    by artist: Dawid Kajdan
    in album: Ta panna
      type: MusicAlbum
      date published: 2023-06-07
    genre: disco polo
    isrc code: FRX872377980
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-13T09:42:29+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x214d07f59801fbd50ca5c19963e16e7aaf3ffd05c6559740875694ec672a02ed
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957851
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957851
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX872377980
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-13T11:26:33Z
    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 0x214d07f59801fbd50ca5c19963e16e7aaf3ffd05c6559740875694ec672a02ed. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FRX872377980.
      date published: 2026-07-13T11:26:33Z
    audio: Ta panna
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 148.03
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.802
      additional property: Energy
        type: PropertyValue
        value: 0.743
      additional property: Speechiness
        type: PropertyValue
        value: 0.208
      additional property: Acousticness
        type: PropertyValue
        value: 0.022
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.045
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.853
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.213
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Minor