A verified index typically cross-references files against databases like Redump or No-Intro. These organizations maintain checksums (digital fingerprints) that allow users to confirm their file matches the original master copy perfectly. Top Sources for a Verified PSP Index
If you struggle to find a clean web index, consider private torrent trackers focused on game preservation. Sites like (formerly GGn) or Redacted require invites but offer 100% verified PSP sets via Redump datfiles. index of psp games iso verified
The gold standard for verified games is a collection that matches the (for UMD discs) or (for digital PSN titles) databases. Redump PSP Collection index of psp games iso verified