My RERA check discovery for Delhi properties

My loan for Altura GK2 is pre-approved but I'm still feeling uneasy. Swastik Developers ka RERA registration kaise check karte hain? Website pe bas number milta hai, but how to verify actual status? Aur builder ka track record kaise pata chale? Parents bolte hain legal checks important hain, but I don't know where to start. Koi genuine resources hain kya, especially for Delhi properties?