Milan Zelenka
type: MusicGroup
description: Milan Zelenka (born 4 June 1939) is a Czech guitarist, composer and music arranger. Music career Zelenka was born in Czechoslovakia and studied guitar at the Prague Conservatory with Štěpán Urban. Wh
popularity: 14
followers: 308
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcaf592a8ed520e5ae5b5786aae45c175c7ea588e72814e18165f40ebb2a48119
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953791
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953791
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/df028558-77f1-4a1c-b77d-e70040b71e0a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/df028558-77f1-4a1c-b77d-e70040b71e0a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/df028558-77f1-4a1c-b77d-e70040b71e0a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T13:40:30Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcaf592a8ed520e5ae5b5786aae45c175c7ea588e72814e18165f40ebb2a48119","name":"Milan Zelenka","registered_at":"2026-06-15T03:56:45Z","symbol":"NIM0674542","token_address":"0xd119b150a3fc6e3213d5918ae2b3a997d9c78525","type":"artist","uuid":"df028558-77f1-4a1c-b77d-e70040b71e0a"}
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 0xcaf592a8ed520e5ae5b5786aae45c175c7ea588e72814e18165f40ebb2a48119. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df028558-77f1-4a1c-b77d-e70040b71e0a.json and https://artists.proofprofile.net/proofs/artist/df028558-77f1-4a1c-b77d-e70040b71e0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T19:59:56Z
  text: {"copyright_id":"0xcaf592a8ed520e5ae5b5786aae45c175c7ea588e72814e18165f40ebb2a48119","name":"Milan Zelenka","registered_at":"2026-06-15T03:56:45Z","symbol":"NIM0674542","token_address":"0xd119b150a3fc6e3213d5918ae2b3a997d9c78525","type":"artist","uuid":"df028558-77f1-4a1c-b77d-e70040b71e0a"}
album: Václav Kučera, Karel Reiner, Manuel de Falla, Štěpán Lucký
  type: MusicAlbum
  date published: 1974
album: Guitarreo
  type: MusicAlbum
  date published: 1995-06-08
album: The Golden Age of the Guitar
  type: MusicAlbum
  date published: 1997-02-23
album: Contemporary Czech Works for Guitar
  type: MusicAlbum
  date published: 2017-01-14
album: Kytice
  type: MusicAlbum
  date published: 2022-07-05
track: Concerto for Guitar, Strings and B.c. in C Major: I. Allegro

Concerto for Guitar, Strings and B.c. in C Major: I. Allegro
type: MusicRecording
duration: PT3M5S
duration ms: 185773
explicit: false
by artist: Antonio Vivaldi
by artist: Annette Struck-Vrangos
by artist: Milan Zelenka
by artist: Jozef Zsapka
by artist: Dagmar Zsapkova
in album: Vivaldi: Concerto for Guitar in D and in C - Concerto for Mandolin in E Major and RV 425
  type: MusicAlbum
  date published: 2009-01-01
isrc code: USSJ10812921
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T23:13:36+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7d83239624f645a39b5423a48fbf49c421152e654021bf58611ae7a0913440ff
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957120
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957120
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSJ10812921
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:22:41+00:00
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 957120
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-08T03:22:41+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d83239624f645a39b5423a48fbf49c421152e654021bf58611ae7a0913440ff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSJ10812921.
  date published: 2026-07-08T08:56:20Z
audio: Concerto for Guitar, Strings and B.c. in C Major: I. Allegro
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 107.785
  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: 0.505
  additional property: Energy
    type: PropertyValue
    value: 0.378
  additional property: Speechiness
    type: PropertyValue
    value: 0.044
  additional property: Acousticness
    type: PropertyValue
    value: 0.892
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.855
  additional property: Liveness
    type: PropertyValue
    value: 0.097
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.531
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.402
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major