Bad Friends
type: MusicGroup
description: is a 2009 tribute album, is kade from , which translates to "Bad friend" and is the origin of Yū Aku's name. The final track, "Kawahara no Ishikawa Goemon" was originally recorded by Eiichi Ohtaki (
popularity: 19
followers: 651
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additional property: CopyrightChainExplorerURL
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  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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c8e928f8fd5c916bf1dde4ec85c72892223a46413212d578feec146316ba1a. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fe05554-d348-4eaa-b0da-d7e02d98d6ca.json and https://artists.proofprofile.net/proofs/artist/4fe05554-d348-4eaa-b0da-d7e02d98d6ca.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-14T16:43:25Z
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album: Back 2 U
  type: MusicAlbum
  date published: 2024-02-15
album: Proud
  type: MusicAlbum
  date published: 2024-03-22
album: Find Me
  type: MusicAlbum
  date published: 2024-05-31
album: Rewind
  type: MusicAlbum
  date published: 2024-08-30
album: Find Me
  type: MusicAlbum
  date published: 2024-11-15
album: Arcade
  type: MusicAlbum
  date published: 2025-02-26
album: Arcade
  type: MusicAlbum
  date published: 2025-03-14
  track: Arcade
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    by artist: Bad Friends
    in album: Arcade
      type: MusicAlbum
      date published: 2025-03-14
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
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      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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006f4cc9fd570a8618fe9d3c81e4b475ba46a7b66581db32afb9da5bb1e1f283. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHP2516335 — a six-check JSON result.
      date published: 2026-07-04T10:04:33Z
    audio: Arcade
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      additional property: Danceability
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
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      additional property: Mode Name
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  track: Arcade - Extended
    type: MusicRecording
    duration: PT3M17S
    duration ms: 197813
    explicit: false
    by artist: Bad Friends
    in album: Arcade
      type: MusicAlbum
      date published: 2025-03-14
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    additional property: OTSTimestamp
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    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
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      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e003275521a7238b22f0fab0c6a7866d71deea71d36639553e579799777c1b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHP2564809 — a six-check JSON result.
      date published: 2026-07-21T00:24:07Z
    audio: Arcade - Extended
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      additional property: Tempo (BPM)
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
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        value: 4
      additional property: Danceability
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        value: 0.76
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Will U?
album: In Your Eyes
album: MEGAPHONE

Energy
type: PropertyValue
value: 0.681

Speechiness
type: PropertyValue
value: 0.162

Acousticness
type: PropertyValue
value: 0.073

Instrumentalness
type: PropertyValue
value: 0.589

Liveness
type: PropertyValue
value: 0.047

Valence (Positivity)
type: PropertyValue
value: 0.494

Loudness (dB)
type: PropertyValue
value: -8.01

Key Name
type: PropertyValue
value: F#

Mode Name
type: PropertyValue
value: Major

Will U?
type: MusicAlbum
date published: 2025-04-04

In Your Eyes
type: MusicAlbum
date published: 2025-05-02

MEGAPHONE
type: MusicAlbum
date published: 2025-09-19