Know ART made "Proof." available on October 28, 2022. For a fairly short song, this song is "Proof." is considered an explicit song with a duration of 1:55. Since Proof. only contains only one song in the album, we like to consider this song as a single. In terms of popularity, Proof. is currently below average in popularity. Even with the track produces more of a neutral energy, it is pretty danceable compared to others.

Proof. テンポ

With Proof. by Know ART having a テンポ of 97 with a half-time of 48 テンポ and a double-time of 194 テンポ, we would consider this track to have a Andante (at a walking pace) tempo marking. Because of this, we believe that the song has an overall slow tempo. The time signature for this track is 4/4.

Proof. キー

This song is in the music key of G Major. Or for those who are familiar with the camelot wheel, this song has a camelot key of 9B. So, the perfect camelot match for 9B would be either 9B or 10A. While, 10B can give you a low energy boost. For moderate energy boost, you would use 6B and a high energy boost can either be 11B or 4B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 9A or 8B will give you a low energy drop, 12B would be a moderate one, and 7B or 2B would be a high energy drop. Lastly, 6A allows you to change the mood.