Running a BIOS you downloaded for a game you own a physical copy of exists in a gray area that most copyright holders (Sony) ignore, provided you are not distributing the BIOS or using it for commercial gain (e.g., a "Retro Box" sold on Etsy).
If yours differs, you may have a different revision (e.g., SCPH-5502 v4.1 or a corrupted dump). playstation scph5502 v30 europe bios scph5502bin
To stay on the right side of copyright, it is recommended to dump the BIOS from your own physical console. Most emulation communities provide guides on how to use a "softmod" or a cheat cartridge to backup your internal firmware. setting up a specific emulator with this BIOS, or are you troubleshooting a physical console hardware Running a BIOS you downloaded for a game