There are two known revisions: v1.20 (the most common) and v2.00 (late 2011 consoles). The hash above is for v1.20. The v2.00 BIOS has SHA-1 e504e0ffeab2861497ebf018f712675d16443de5. Both are "verified" but v1.20 is recommended for broadest compatibility.
For users of emulators like PCSX2, the verification of the SCPH-90006 BIOS is critical for several reasons: scph90006 bios verified
The phrase scph90006 bios verified should not be taken at face value. It is a promise that a file matches a known, good dump from a legitimate console. By learning to check SHA-1 hashes—specifically b7306ad4ccb041b295e2eca1f1b49c310e4d816f—you protect yourself from malware, emulation headaches, and legal ambiguity. There are two known revisions: v1
Whether you choose to dump your own BIOS or compare hashes from a friend’s dump, remember: emulation is about preservation. Treat the BIOS with the respect it deserves as a copyrighted piece of engineering history. And always, always verify before you emulate. Both are "verified" but v1