A few months ago, I installed CFW on two 3DS systems and backed up each of their otp.bin. Recently, one of the system's SD card corrupted and I lost everything. I was able to recover most of it. But now I'm having trouble recovering the otp.bin. I have two and I don't know which one goes with which 3DS, is there a way I could tell which otp.bin is for which 3DS?