I went to High School in the South and we used Hail to the Victors.
BNL’s although it is a variation of Give my Regards to Broadway is unique and I listened to Cornell’s on Apple Music and it sounded nothing like either the Broadway or BNL version.
Copyright infringement can be a very serious infraction even for a church to use music and not pay a fee and give proper credit on the screen, in a book etc.