, you can verify that your CHD collection matches the official hashes of original retail discs. How to Get or Create Verified CHDs
DAT files are XML documents containing the correct SHA-1, MD5, and CRC32 checksums for every known PS2 disc. Download the latest Sony PlayStation 2 - DAT file (Redump) from the official Redump source or via a DAT-o-MATIC service. ps2 chd roms verified
To create or verify these files, enthusiasts use a command-line tool called (part of the MAME project). You can simplify this process with: , you can verify that your CHD collection