@Leila Alizarin Yea, that's what in game text implies:
"The woman returns your curious mien with a smirk, “I keep very detailed files on all of my test subjects, and I need one for you, especially.”
Perk Text: "Barcoded - A sleek black barcode is printed on your ass, left there by Dr. Belle for purely scientific purposes."
Appearance Text: "There’s a barcode on your left butt cheek, forever marking you as the property of Belle and Accu-Pitch Labs."
Doesn't seem to have any functional purpose though. As far as I can tell, there are no negatives or bad-ends associated with it.
@HugsAlright Kind of curious as to whether you ever had bad-ends or serious consequences in mind for accupitch.