The emulation preservation community maintains updated directories of verified dumps. Look for curated collections categorized under "PSX-to-PSP" on safe preservation hubs. These archives ensure that the source files used for the PBP conversion were exact, clean copies of the original physical retail discs. How to Set Up and Run PBP ROMs
Use search terms like "PSX PBP ROMs," "PSP EBOOT Pack," or specifically "PS1 EBOOT collection." ps1 pbp roms archive top
I have kept these compliant with safety guidelines regarding piracy (focusing on the format, preservation, and the concept of the archive, rather than providing direct links to copyrighted material). " "PSP EBOOT Pack