Nikkain
type: MusicGroup
popularity: 4
followers: 333
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6e8df8e3112f1ca960be584aa60eed6cf8c267dfb64ce4183551b1cdef273178
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954689
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954689
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e1e9449c-d53e-4c68-8fb2-3102b70df08d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e1e9449c-d53e-4c68-8fb2-3102b70df08d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e1e9449c-d53e-4c68-8fb2-3102b70df08d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T10:35:31Z
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 0x6e8df8e3112f1ca960be584aa60eed6cf8c267dfb64ce4183551b1cdef273178. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1e9449c-d53e-4c68-8fb2-3102b70df08d.json and https://artists.proofprofile.net/proofs/artist/e1e9449c-d53e-4c68-8fb2-3102b70df08d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T10:35:31Z
album: Sbčka
  type: MusicAlbum
  date published: 2023-08-17
album: Express
  type: MusicAlbum
  date published: 2023-10-04
album: Škola zabíjí umělce
  type: MusicAlbum
  date published: 2023-11-25
album: SWAGGY BOI
  type: MusicAlbum
  date published: 2024-02-08
album: 250 92
  type: MusicAlbum
  date published: 2024-03-28
album: Up
  type: MusicAlbum
  date published: 2024-05-14
album: Pretty Boy
  type: MusicAlbum
  date published: 2024-07-16
album: V!be
  type: MusicAlbum
  date published: 2024-07-30
album: NIKKDYBACK!
  type: MusicAlbum
  date published: 2024-08-30
album: okno x ke hvězdám
  type: MusicAlbum
  date published: 2024-09-03
album: Wassup
  type: MusicAlbum
  date published: 2024-09-10
album: PLNÝ CLUB
  type: MusicAlbum
  date published: 2024-09-20
album: NERUŠ
  type: MusicAlbum
  date published: 2024-10-07
album: CRY BITCH CRY
  type: MusicAlbum
  date published: 2024-10-30
album: ZLE!
  type: MusicAlbum
  date published: 2024-11-23
album: NO FACE NO CASE
  type: MusicAlbum
  date published: 2025-01-07
album: Sbčka 2
  type: MusicAlbum
  date published: 2025-02-10
album: První a Poslední
  type: MusicAlbum
  date published: 2025-04-02
  track: První a Poslední
    type: MusicRecording
    duration: PT2M1S
    duration ms: 121455
    explicit: true
    by artist: Nikkain
    in album: První a Poslední
      type: MusicAlbum
      date published: 2025-04-02
    isrc code: QZK6J2547554
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T05:08:04+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xfdd6a58b6fbb322e73874aea2a1c9172b615eb3d2faeab99633b6e6340b1e4a4
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956772
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956772
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6J2547554
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T10:01:46Z
    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 0xfdd6a58b6fbb322e73874aea2a1c9172b615eb3d2faeab99633b6e6340b1e4a4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6J2547554.
      date published: 2026-07-05T10:01:46Z
    audio: První a Poslední
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 151.051
      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: 0.857
      additional property: Energy
        type: PropertyValue
        value: 0.5
      additional property: Speechiness
        type: PropertyValue
        value: 0.269
      additional property: Acousticness
        type: PropertyValue
        value: 0.027
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.099
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.702
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.146
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: snít
  type: MusicAlbum
  date published: 2025-04-30
album: #ALL IN
  type: MusicAlbum
  date published: 2025-05-22
album: Houdini
  type: MusicAlbum
  date published: 2025-08-15
album: Curling
  type: MusicAlbum
  date published: 2025-09-26
  track: Curling
    type: MusicRecording
    duration: PT2M56S
    duration ms: 176707
    explicit: true
    by artist: Nikkain
    in album: Curling
      type: MusicAlbum
      date published: 2025-09-26
    isrc code: QT3EX2570995
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T09:33:26+00:00
    additional property: CopyrightChainExplorerURL
    additional property: OTSHash
    additional property: OTSBitcoinBlock
    additional property: OTSBitcoinBlockVerifyURL
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Curling

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x803ad3679816ddec1a01b163f57cbdb8c2580cb6a478169470b03924f345ca17

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 959118

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/959118

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3EX2570995

OTSTimestamp
type: PropertyValue
value: 2026-07-22T10:01:58Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803ad3679816ddec1a01b163f57cbdb8c2580cb6a478169470b03924f345ca17. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QT3EX2570995.
date published: 2026-07-22T10:01:58Z

Curling
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 152.963
additional property: Musical Key
  type: PropertyValue
  value: 11
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.659
additional property: Energy
  type: PropertyValue
  value: 0.625
additional property: Speechiness
  type: PropertyValue
  value: 0.111
additional property: Acousticness
  type: PropertyValue
  value: 0.034
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.273
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.338
additional property: Loudness (dB)
  type: PropertyValue
  value: -9.908
additional property: Key Name
  type: PropertyValue
  value: B
additional property: Mode Name
  type: PropertyValue
  value: Major