I dumped a few PS2 discs and I noticed that 4 of them are not in your database.
SLPM-62209 Gigantic Drive
SLPM-62638 Simple 2000 Series Vol. 80: The O-Ane-Chan Puruu
SLPS-20161 Saikyou Toudai Shogi Special
SLPS-20488 Simple 2000 Series Vol. 113: The Tairyou Jigoku
I've got 200+ games (NTSC-J and PAL) that I haven't dumped yet.