Not a Word Changed

Indeed we have some of the oldest copies of the Qur'an, purported to be the oldest. As has been said, ʿUthmān was the first to have it consolidated: all the various readings and modes of reading consolidated and written in his very particular style, which allowed for all seven readings spoken of the other day, and sent out to the seven different cities of the Muslim world. And in the way it was written, not a thing has changed since then.

Dots have been added, yes, for there were no dots in those days. They had no distinction between the bāʾ, the tāʾ and the thāʾ, or between the jīm, the ḥāʾ and the khāʾ. They knew how to read it as it was. We should not be able to make that distinction, having no such training. So afterwards they added the dots, and then the fatḥah and the kasrah, the voweling. All of that was done later, and certain further things were added since. But otherwise the lettering and the wording are the same. Nothing has changed in that respect. What was allowed to be read as it was read before is exactly what may still be read today.