You are free to try to prove it, but so far, the only 'proof' anyone has ever attempted to present on this has been some hogwash about Obama's mother not living in the U.S. long enough after her 16th birthday for him to be qualified as a 'natural born' citizen.
I would suggest you check the law as it stood in 1961, which would be the “ruling grade” as they say in railroading.