404
type: MusicGroup
description: 404 may refer to: 404 (number) AD 404 404 BC HTTP 404, the HTTP error response status for "Not Found" Cars Peugeot 404, a large family car Bristol 404, a luxury car Unimog 404, an offroad-ca
popularity: 3
followers: 416
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2e3df3856c911429dc5c61f05bb8f8a280880fca5ec2d5f9f85447ad2d97702d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7fd6d3ac-a076-4772-8795-8948f78acda0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7fd6d3ac-a076-4772-8795-8948f78acda0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7fd6d3ac-a076-4772-8795-8948f78acda0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
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 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 0x2e3df3856c911429dc5c61f05bb8f8a280880fca5ec2d5f9f85447ad2d97702d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fd6d3ac-a076-4772-8795-8948f78acda0.json and https://artists.proofprofile.net/proofs/artist/7fd6d3ac-a076-4772-8795-8948f78acda0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
album: ROOM (With Monovated)
  type: MusicAlbum
  date published: 2018-07-26
album: ROOM (With. daifa)
  type: MusicAlbum
  date published: 2018-07-26
album: Leave (Feat. Zoorumpug)
  type: MusicAlbum
  date published: 2019-05-25
album: Leave (Feat. Zoorumpug)
  type: MusicAlbum
  date published: 2019-05-25
album: Speedbump
  type: MusicAlbum
  date published: 2019-12-16
album: Careless Child:0.5
  type: MusicAlbum
  date published: 2021-04-26
album: SK8 KID (feat. JJANGYOU)
  type: MusicAlbum
  date published: 2022-07-07
  track: SK8 KID (feat. JJANGYOU)
    type: MusicRecording
    duration: PT2M9S
    duration ms: 129666
    explicit: false
    by artist: 404
    in album: SK8 KID (feat. JJANGYOU)
      type: MusicAlbum
      date published: 2022-07-07
    isrc code: KRB462200693
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-26T18:37:22+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x109618ec739196e4d61d9bacc770a4ea67cd9a054507c648635011939e99b7ca
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956312
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956312
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRB462200693
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-02T05:09:12Z
    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 0x109618ec739196e4d61d9bacc770a4ea67cd9a054507c648635011939e99b7ca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRB462200693.
      date published: 2026-07-02T05:09:12Z
    audio: SK8 KID (feat. JJANGYOU)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 111.265
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.673
      additional property: Energy
        type: PropertyValue
        value: 0.611
      additional property: Speechiness
        type: PropertyValue
        value: 0.094
      additional property: Acousticness
        type: PropertyValue
        value: 0.599
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.131
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.26
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.36
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Rust (feat. Rico)
  type: MusicAlbum
  date published: 2022-08-31
album: FOREVER (feat. Band Westwood)
  type: MusicAlbum
  date published: 2022-09-28
album: Whoop! (Instrumental)
  type: MusicAlbum
  date published: 2022-10-30
album: BRICK (Instrumental)
  type: MusicAlbum
  date published: 2022-11-30
album: FENCE (feat. KINNSHAAWISH & PePe)
  type: MusicAlbum
  date published: 2022-12-29
album: CREDIT CARD
  type: MusicAlbum
  date published: 2023-05-23
album: NUMB U
  type: MusicAlbum
  date published: 2024-03-22
album: NUMB U (Pj Statham Remix)
  type: MusicAlbum
  date published: 2024-06-11