Alas, there are no shortcuts for proofreading music braille. Most transcribers agree that we spend two or three times as much time in proofreading as we spend on the original transcribing. If you will email me individually (firstname.lastname@example.org)I'll be happy to send you some material I put together for an NBA workshop. I think your color-coded highlighting is a very good idea.
Cheers to you. I'm happy to hear that you are progressing so well in the course.