Proof (disambiguation)

Proof may refer to:
 * Proof, a song by Yokomin-P featuring Yuzuki Yukari.
 * Proof, a song by otetsu featuring Hatsune Miku.
 * Proof of Life, a song by Hitoshizuku-P featuring Kagamine Rin.
 * Proof of Tears, a song by Okame-P featuring Megurine Luka.