9bic made "proof" available on April 11, 2020. With this song being around four minutes long, at 3:33, the duration of this song is pretty average compared to other songs. This track is safe for children and doesn't appear to contain any foul language, since the "Explicit" tag was not present in this track. Since proof only contains only one song in the album, we like to consider this song as a single. Furthermore, we believe that the track originated from Japan. Based on our statistics, proof's popularity is below average in popularity right now. The overall mood can be danceable to some, especially with it's high amount of postive energy.

proof テンポ

With proof by 9bic having a テンポ of 144 with a half-time of 72 テンポ and a double-time of 288 テンポ, we would consider this track to have a Allegro (fast, quick, and bright) tempo marking. Because of this, we believe that the song has an overall fast tempo. Looking at the テンポ of this song, this song might go great with jogging or cycling. The time signature for this track is 4/4.

proof キー

D♭ Minor is the music key of this track. Or for those who are familiar with the camelot wheel, this song has a camelot key of 12A. So, the perfect camelot match for 12A would be either 12A or 11B. While, a low energy boost can consist of either 12B or 1A. For moderate energy boost, you would use 9A and a high energy boost can either be 2A or 7A. However, if you are looking for a low energy drop, finding a song with a camelot key of 11A would be a great choice. Where 3A would give you a moderate drop, and 10A or 5A would be a high energy drop. Lastly, 3B allows you to change the mood.