Everything Rachael Cain knows about running her own music label can be traced back to her longtime friend and attorney, Jay B. Ross.He taught Cain that artists have to pay attention to the business side of music, to take steps to protect their creations to prevent them from being ripped off by others.What she learned him pushed her into resurrecting the Chicago-based house-music record label Trax Records in 2007.“I’m glad I’ve come on this road. I feel like, because of Jay and his mentoring, I am in …