The 7A3
type: MusicGroup
genre: west coast hip hop
description: The 7A3 was an American hip hop group based in Los Angeles, California, that released one album in 1988 called Coolin' in Cali. The group was originally composed of brothers Brett and Sean Bouldin and
popularity: 7
followers: 2606
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-16T13:28:01Z
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album: Coolin' In Cali
  type: MusicAlbum
  date published: 1988-01-01
  track: Coolin' In Cali
    type: MusicRecording
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    by artist: The 7A3
    in album: Coolin' In Cali
      type: MusicAlbum
      date published: 1988-01-01
    popularity: 16
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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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-02T05:09:12Z
    audio: Coolin' In Cali
      type: AudioObject
      additional property: Tempo (BPM)
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        value: 122.742
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      additional property: Danceability
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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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track: Coolin' In Cali - Radio Edit
  type: MusicRecording
  duration: PT4M1S
  duration ms: 241933
  explicit: false
  by artist: The 7A3
  in album: ドライブが楽しくなる洋楽ヒッツ！80年代 Hip Hop
    type: MusicAlbum
    date published: 2023-06-30
  isrc code: USIR10400686
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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
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:22:41Z
  audio: Coolin' In Cali - Radio Edit
    type: AudioObject
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Valence (Positivity)
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Loudness (dB)
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Key Name
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Mode Name
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value: Major

Coolin' In Cali - Radio Edit
type: MusicRecording
duration: PT4M1S
duration ms: 241933
explicit: false
by artist: The 7A3
in album: ドライブが楽しくなる洋楽ヒッツ！80年代 Hip Hop
  type: MusicAlbum
  date published: 2025-05-30
isrc code: USIR10400686
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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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c6905c40f4ee849afea7e6f73ed90d6d7fedf3da5dad390c5562b013ae9b20. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USIR10400686.
  date published: 2026-07-08T03:53:27Z
audio: Coolin' In Cali - Radio Edit
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