4k killer
type: MusicGroup
popularity: 3
followers: 67
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0c21ae09ecdbf6ae78828837aefc5700d1fd40d28ebe8bc95de232cc41060adc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a2e82abe-4534-4b5e-83f3-5030cb032e7f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a2e82abe-4534-4b5e-83f3-5030cb032e7f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a2e82abe-4534-4b5e-83f3-5030cb032e7f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0c21ae09ecdbf6ae78828837aefc5700d1fd40d28ebe8bc95de232cc41060adc","name":"4k killer","registered_at":"2026-06-20T06:31:18Z","symbol":"NIM1540488","token_address":"0x09d491036b505fad4bf01e4dd4d55f7db7dc9ee8","type":"artist","uuid":"a2e82abe-4534-4b5e-83f3-5030cb032e7f"}
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 0x0c21ae09ecdbf6ae78828837aefc5700d1fd40d28ebe8bc95de232cc41060adc. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2e82abe-4534-4b5e-83f3-5030cb032e7f.json and https://artists.proofprofile.net/proofs/artist/a2e82abe-4534-4b5e-83f3-5030cb032e7f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
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album: Bubble back
  type: MusicAlbum
  date published: 2024-12-19
album: All me
  type: MusicAlbum
  date published: 2024-12-19
album: W
  type: MusicAlbum
  date published: 2024-12-19
album: Go call mat
  type: MusicAlbum
  date published: 2024-12-20
album: Seen
  type: MusicAlbum
  date published: 2024-12-20
album: Seeing green
  type: MusicAlbum
  date published: 2024-12-22
album: Swich
  type: MusicAlbum
  date published: 2024-12-22
album: 1 of 1
  type: MusicAlbum
  date published: 2024-12-29
album: Bones up
  type: MusicAlbum
  date published: 2025-02-01
album: 2k
  type: MusicAlbum
  date published: 2025-02-12
album: LSD
  type: MusicAlbum
  date published: 2025-03-08
album: Why try
  type: MusicAlbum
  date published: 2025-04-05
  track: Why try
    type: MusicRecording
    duration: PT1M25S
    duration ms: 85054
    explicit: true
    by artist: 4k killer
    in album: Why try
      type: MusicAlbum
      date published: 2025-04-05
    isrc code: QZK6G2565118
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T00:20:08+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb20a9456b9f1c72a1b2d38ecd924f2e6219637e6d7f8ece35e5afa3af6cde06f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958341
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958341
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6G2565118
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T03:23:28Z
    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 0xb20a9456b9f1c72a1b2d38ecd924f2e6219637e6d7f8ece35e5afa3af6cde06f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:23:28Z), 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/QZK6G2565118.
      date published: 2026-07-17T03:23:28Z
    audio: Why try
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 90.17
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.613
      additional property: Energy
        type: PropertyValue
        value: 0.414
      additional property: Speechiness
        type: PropertyValue
        value: 0.104
      additional property: Acousticness
        type: PropertyValue
        value: 0.002
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.021
      additional property: Liveness
        type: PropertyValue
        value: 0.175
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.336
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.56
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Poconos
  type: MusicAlbum
  date published: 2025-04-11
album: Last standing
  type: MusicAlbum
  date published: 2025-04-20
album: My world freestyle
  type: MusicAlbum
  date published: 2025-05-01
album: Universal
  type: MusicAlbum
  date published: 2025-05-10
  track: Row
    type: MusicRecording
    duration: PT2M11S
    duration ms: 131587
    explicit: true
    by artist: 4k killer
    in album: Universal
      type: MusicAlbum
      date published: 2025-05-10
    isrc code: QZNWX2596376
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T04:42:35+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9db6a2ba82fd542c776e930c99016f59a427c662e0df03314639f79dc4818222
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958242
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958242
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2596376
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T07:44:15Z
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Row
  track: Kick in
album: Melly talk
album: 4k
album: Angel wings
album: In and out
album: From the bottom
album: from the bottom
album: I want you
album: Unlike Us
album: Free for all
album: Melly talk pt2
album: Once talk
album: 50 bullets
album: FOL
album: BGM

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 0x9db6a2ba82fd542c776e930c99016f59a427c662e0df03314639f79dc4818222. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:15Z), 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/QZNWX2596376.
date published: 2026-07-16T07:44:15Z

Row
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 160.079
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: 0.541
additional property: Energy
  type: PropertyValue
  value: 0.429
additional property: Speechiness
  type: PropertyValue
  value: 0.192
additional property: Acousticness
  type: PropertyValue
  value: 0.011
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.19
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.077
additional property: Loudness (dB)
  type: PropertyValue
  value: -12.546
additional property: Key Name
  type: PropertyValue
  value: Bb
additional property: Mode Name
  type: PropertyValue
  value: Minor

Kick in
type: MusicRecording
duration: PT3M14S
duration ms: 194606
explicit: true
by artist: 4k killer
in album: Universal
  type: MusicAlbum
  date published: 2025-05-10
isrc code: QZNWX2596377
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-15T18:18:01+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4f3c817590b3e11664bbfd68e504845da50037c0a775484d7b7a705817a97fda
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958194
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958194
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2596377
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-15T20:32:27Z
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 0x4f3c817590b3e11664bbfd68e504845da50037c0a775484d7b7a705817a97fda. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWX2596377.
  date published: 2026-07-15T20:32:27Z
audio: Kick in
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 143.958
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.522
  additional property: Energy
    type: PropertyValue
    value: 0.471
  additional property: Speechiness
    type: PropertyValue
    value: 0.374
  additional property: Acousticness
    type: PropertyValue
    value: 0.069
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.147
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.276
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.136
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Melly talk
type: MusicAlbum
date published: 2025-05-15

4k
type: MusicAlbum
date published: 2025-06-25

Angel wings
type: MusicAlbum
date published: 2025-07-17
track: Angel wings
  type: MusicRecording
  duration: PT2M41S
  duration ms: 161425
  explicit: true
  by artist: 4k killer
  in album: Angel wings
    type: MusicAlbum
    date published: 2025-07-17
  isrc code: QZWFH2594022
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T00:48:07+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x5684ad9df934026b290e62294b08d8f41a6bf5b3054ae0115326fc98187da14a
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958474
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958474
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFH2594022
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-18T00:59:09Z
  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 0x5684ad9df934026b290e62294b08d8f41a6bf5b3054ae0115326fc98187da14a. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZWFH2594022.
    date published: 2026-07-18T00:59:09Z
  audio: Angel wings
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 130.985
    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: 0.675
    additional property: Energy
      type: PropertyValue
      value: 0.679
    additional property: Speechiness
      type: PropertyValue
      value: 0.057
    additional property: Acousticness
      type: PropertyValue
      value: 0.001
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.147
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.048
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.813
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Minor

In and out
type: MusicAlbum
date published: 2025-07-23

From the bottom
type: MusicAlbum
date published: 2025-08-17

from the bottom
type: MusicAlbum
date published: 2025-08-20

I want you
type: MusicAlbum
date published: 2025-08-25

Unlike Us
type: MusicAlbum
date published: 2025-08-27

Free for all
type: MusicAlbum
date published: 2025-09-04

Melly talk pt2
type: MusicAlbum
date published: 2025-09-15

Once talk
type: MusicAlbum
date published: 2025-09-22

50 bullets
type: MusicAlbum
date published: 2025-09-26

FOL
type: MusicAlbum
date published: 2025-10-13

BGM
type: MusicAlbum
date published: 2025-10-31