How to really check RERA and clear titles in Greater Noida?

Greater Noida West keeps coming up for investment, but I'm honestly fed up of renting and finally want to build some equity. The EMI vs rent math is just too compelling now. I'm looking at Alpha Builtech projects, maybe even Marshal Green View near Yamuna Expressway for that Jewar Airport upside. Before committing, what's the real deal with RERA registration checks? How do you spot actual red flags beyond just a number? And title verification – what are the absolute critical steps to ensure a clear title? Don't want legal hassles affecting exit options later.