No, nobody has proof. Near death experiences? A few things wrong with using that as proof. One would involve a quote from the bible about dying once. Another would be quotes from the bible about when the ascension takes place. Another would be the great variances in the experiences people who had an NDE. Another would be the question of how an NDE may actually be a dream. But the main problem is that this is just people saying something happened. There are thousands of people who swear they have been abducted by aliens. Is that proof of life on other planets?
The fact is that none of us know one way or the other. Some of us believe... what we were taught or what we want to believe. Some of us looked for the proof and found none but did find logical reasons to believe that religious beliefs are from the mind of man. It doesn't really affect me if people choose to believe. The logic and rationalizations about which parts of religious texts that believers choose to believe is curious.
NDE are interesting though. I'd love to believe that consciousness survives the death of the body.
Decoding The Mystery Of Near-Death Experiences : NPR
BBC News - Near-death experience 'all in the mind'