Derwana
type: MusicGroup
genre: folk metal
popularity: 4
followers: 248
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf004536df45aae78269dc3b4cbb1d29a82b5a8b01b76fea03618e8bacee14ffe
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953899
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953899
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/123cbb50-2b90-40a6-9cb0-8f58f87a703e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/123cbb50-2b90-40a6-9cb0-8f58f87a703e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/123cbb50-2b90-40a6-9cb0-8f58f87a703e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T06:37:25Z
additional property: OTSCanonicalRecord
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 0xf004536df45aae78269dc3b4cbb1d29a82b5a8b01b76fea03618e8bacee14ffe. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/123cbb50-2b90-40a6-9cb0-8f58f87a703e.json and https://artists.proofprofile.net/proofs/artist/123cbb50-2b90-40a6-9cb0-8f58f87a703e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T06:37:25Z
album: Topielica
  type: MusicAlbum
  date published: 2013-10-05
album: Dajcie mnie dobre Bogi
  type: MusicAlbum
  date published: 2021-01-01
album: Dziady
  type: MusicAlbum
  date published: 2022-11-29
album: Twoje oczy
  type: MusicAlbum
  date published: 2023-02-14
album: Wskazówka
  type: MusicAlbum
  date published: 2023-03-21
album: Zmora (Derwana version)
  type: MusicAlbum
  date published: 2023-09-30
album: Nierządnica
  type: MusicAlbum
  date published: 2024-03-03
album: Gusła (old version)
  type: MusicAlbum
  date published: 2024-03-03
album: Niewinna
  type: MusicAlbum
  date published: 2024-09-23
album: Na ziemi i pod ziemią
  type: MusicAlbum
  date published: 2024-11-29
album: Dziady (ogniskowo)
  type: MusicAlbum
  date published: 2025-08-01
album: Czary Modły
  type: MusicAlbum
  date published: 2025-08-01
album: Szumibór (ogniskowo)
  type: MusicAlbum
  date published: 2025-08-01
album: Jaskółeczka (ogniskowo)
  type: MusicAlbum
  date published: 2025-08-01
  track: Jaskółeczka (ogniskowo)
    type: MusicRecording
    duration: PT4M3S
    duration ms: 243387
    explicit: false
    by artist: Derwana
    in album: Jaskółeczka (ogniskowo)
      type: MusicAlbum
      date published: 2025-08-01
    genre: folk metal
    isrc code: QZWFQ2506246
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T11:43:33+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xca46e936ca54860de36b3950e1166abb3ccefe1e98fd20c1d6758ffba9adb310
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956826
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956826
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2506246
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T19:27:56Z
    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 0xca46e936ca54860de36b3950e1166abb3ccefe1e98fd20c1d6758ffba9adb310. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFQ2506246.
      date published: 2026-07-05T19:27:56Z
    audio: Jaskółeczka (ogniskowo)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 119.99
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.633
      additional property: Energy
        type: PropertyValue
        value: 0.625
      additional property: Speechiness
        type: PropertyValue
        value: 0.042
      additional property: Acousticness
        type: PropertyValue
        value: 0.229
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.002
      additional property: Liveness
        type: PropertyValue
        value: 0.418
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.271
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.889
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major