Du Du A
type: MusicGroup
description: Du Du A () was a Serbian and Yugoslav alternative rock band formed in Belgrade in 1981. Formed by Dejan Kostić (vocals, guitar, bass guitar) and Vuk Vujačić (saxophone), and soon joined by Zoran Zago
popularity: 3
followers: 229
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5acf6644a7a0b6e11ddcec5cff63ab7c031870ab905aa8f2cd4289866bf430e8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7164daba-51c4-44f6-b7d0-630df3d1d07b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7164daba-51c4-44f6-b7d0-630df3d1d07b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7164daba-51c4-44f6-b7d0-630df3d1d07b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5acf6644a7a0b6e11ddcec5cff63ab7c031870ab905aa8f2cd4289866bf430e8","name":"Du Du A","registered_at":"2026-06-17T05:08:59Z","symbol":"NIM1290810","token_address":"0x9a907ccad39ad35e6e880821834a16e64afa3102","type":"artist","uuid":"7164daba-51c4-44f6-b7d0-630df3d1d07b"}
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 0x5acf6644a7a0b6e11ddcec5cff63ab7c031870ab905aa8f2cd4289866bf430e8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7164daba-51c4-44f6-b7d0-630df3d1d07b.json and https://artists.proofprofile.net/proofs/artist/7164daba-51c4-44f6-b7d0-630df3d1d07b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x5acf6644a7a0b6e11ddcec5cff63ab7c031870ab905aa8f2cd4289866bf430e8","name":"Du Du A","registered_at":"2026-06-17T05:08:59Z","symbol":"NIM1290810","token_address":"0x9a907ccad39ad35e6e880821834a16e64afa3102","type":"artist","uuid":"7164daba-51c4-44f6-b7d0-630df3d1d07b"}
album: Primitivni ples
  type: MusicAlbum
  date published: 1983-05-23
album: Du Du Archive 1984-1989
  type: MusicAlbum
  date published: 2024-02-22
track: Romance
  type: MusicRecording
  duration: PT4M7S
  duration ms: 247560
  explicit: false
  by artist: Du Du A
  in album: Electronic Jugoton - Synthetic Music From Yugoslavia 1964-1989
    type: MusicAlbum
    date published: 2014-10-22
  isrc code: HRA048473711
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T09:11:22+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x9adc7049114c741f9c99272deee4b9537cb6e9c1bd7f3489eace87b30d032257
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HRA048473711
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  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 0x9adc7049114c741f9c99272deee4b9537cb6e9c1bd7f3489eace87b30d032257. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HRA048473711.
    date published: 2026-07-08T03:20:19Z
  audio: Romance
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 130.163
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.703
    additional property: Energy
      type: PropertyValue
      value: 0.809
    additional property: Speechiness
      type: PropertyValue
      value: 0.059
    additional property: Acousticness
      type: PropertyValue
      value: 0.061
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.248
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.911
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.562
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major