Prestige City legal checks: My investor concerns

My current 2BHK in Bellandur feels cramped now, so I'm eyeing 3BHKs, especially around Sarjapur Road like Prestige City. I'm already stressed about legal checks. What's the best way to verify a builder's RERA track record? And for title verification, what are the common pitfalls people miss before committing capital? Don't want future exit issues.