I am not sure about BBMP, but if you want to find about BMRDA or BIAPPA approved layouts there is some information available in their respective wesbites:
http://www.biaapa.in/ - there look for LIST OF LAYOUTS
http://www.bmrda.kar.nic.in/residential-4.htm
But that is usually not enough in the case of plot verification in Bangalore. You should get your property papers thoroughly verified by a competent lawyer. And as an additional measure ask them to cross-verify these approvals by physically visiting these government offices.