after research most of us dont have anything to worry about as long as you dont invade other peoples worlds with edited stats like max attributes hp and stam than you wont end up in the book of the guilty. You end up in the book of the guilty by acquiring sin and the only ways to do that is by having another player file an indictment against you or if you betray and ally but if you dont invade peoples worlds they cant file an indictment on you and if you stay out of other peoples worlds you cant betray them lol. There is nothing in the strategy guide that says you'd be put in the book of the guilty for having modded stats only other players can do that so stay out of others worlds. However if someone invades your world show not mercy as they cannot file an indictment on you but you can on them if you so choose. only when this happens can people look at the book of the guilty and check on your stats, level, hp, stam, and any equipment you are currently wearing ( i bit too much info if you ask me) so just be careful everyone and turn the leader boards on the xbox off in options in game that helps too.
Edit: if for some reason you do actually have sin then go back to where to first bell was rung after u beat the two gargoyles and talk to the creepy preacher guy and have him absolve you of your sin if you dont have any he will tell you and if you do its gonna be 2000 souls times the number of sin's u actually have. So if you've been naughty and have like 5 sin points its gonna be 10,000 souls to be absolved.











