How the Hell would one prove that they DIDN’T give verbal permission? This does nothing....still “he said she said.” Absurd.
Take out your smart phone, record video of her giving consent. Email video to yourself (or upload to youtube or send to her parents and sorority sisters, depending on your mood afterwards)
You are still operating under the quaint early American notion of "innocent until proven guilty". On college campuses, that silly remnant of the patriarchal white society has been abolished! Now, all it takes in the accusation by a coed for the male (usually white) student to be publicly branded a sex offender, forced to take sensitivity training, be expelled or even turned over for prosecution. (Of course, that last is to be avoided if possible, because we have not yet been able remove the presumption of innocence from some of those archaic courts that still follow the Constitution - another document written by white male slaveowners...)