CHeck the hhistory books. Ask Muslim scholars.. Do a search on for Kaliph Uthman (Usman) and you will see that it is a fact accepted by muslims thats the original version as left by the prophet was burnt and no originals were left behind. They justify it by saying that he only corrected the pronnciation and grammer. And the fall of the just empire of islam was during the reign of Usman.