Yeah but how somebody will find that out, even if he sees the celebrity, even if asks him question whether he supports the projects or not. Even he says "YES" it will be enough for you? 
The only possible thing to do is to contact some well-know and credible Indian newspaper and ask them to find that out?! But again I dont think they will do it. Your project is doing it wrong, they should have in the first place provided some evidence that those celebrities support that project. Its very simple make a small videos where they loud and clear associate themselves with this project.
The only possible thing to do is to contact some well-know and credible Indian newspaper and ask them to find that out?! But again I dont think they will do it. Your project is doing it wrong, they should have in the first place provided some evidence that those celebrities support that project. Its very simple make a small videos where they loud and clear associate themselves with this project.