At the time of the Prophet Muhammad (May the peace and blessings of God Allmighty be upon him) the Quran, the Quraan was documented and saved within the family and companions of the prophet (pbuh), it was protected and preserved from mans corruption! Uthman (ra) he did NOT decide about what number order the chapters or verses were to be in as i said the Quran was already documented and memorised by the Prophet Pbuh and his companions. Chapters and verses were recited by our Beloved Prophet Muhammad (saw) five times a day in the muslim daily prayers. The memorization of the entire Noble Quran is something sacred in Islam.Memorising the Quran helped the Noble Quran remain error-free from man's false documentation. Also realise that Allaah Allmighty your lord and my lord says in his Noble Book :
"We [Allah] have, without doubt, sent down the Message [The Noble Quran]; and We will assuredly Guard it (from corruption).
However, when the death of the Prophet (May the peace and blessings of God be upon him) took place, Islaam had only still remained in the 2 cities which are known as Makkah and Madinah, and Islaam had increased amongst the people in the region, also keep in mind that not all people in the entire of region had the same dialect but also had different languages. At the time many languages were spoken ofcourse including arabic along with its 7 dialects. Becuase all the languages were different to each other, you would need a translator to translate most of the conversation. And because Islaam had spread through out the enitre region, the Quraan was documented to different parts of the region but also within the different dialects and the different languages that were spoken. Note that the original Quran was in the Quraishi dialect because Uthman (RA) was the caliph Islaam was pretty much in good hands, he wanted the Quraan to be taught in the Quraishi dialect only, with one recitation and one dialect. If you were to recite the Quran in a different dialect rather than the original dialect which was the Quraishi, then you would end up with different words in spellings also in different meaning than the original.
When Uthman (RA) got hold of all the Quraans, he found that they were all in different dialects and in some cases were change to sound like the other dialect rather than the original, so therefore he uthman (ra) ordered for all those copies to be burnt as they did not have the same arabic that was revealed to the Prophet (saw), also because the words were different because of the dialect difference. He then got all the chapters together that were revealed to the Prophet (pbuh) that were already written during the time of the prophet (pbuh) in the city of Madinah and formed the one and true copy of the Noble Quran.
So how i mentioned early that the Quraan was already documented and memorised during the time of the Prophet Peace be upon him and that Uthman (ra) did NOT determine the number of the ayaahs or surahs, the verses that were recited in the 5 daily prayers of the Muslim.
So in conclusion the Quraan wasnt Changed nor Burned but only the ones that had been spread due to the different dialect and languages during the time, as those parts had been burned and the original copy that remained was with Uthman (ra) had not, when he realised that people started to interpret the real meanings of the Quran because of their dialect and in some cases to sound like other dialects, those were the ones burned because they were NOT the original.
So since the day the Quraan was revealed and till today, the same Quranic dialect that was used at the time of the Prophet (May the peace and blessings of God be upon him) was used and is STILL used today. That same dialect is taught today, if you go to any muslim family, you can gather all the recitations of the Quraan and you will see they are all the same!
Actually it does prove one thing, that the Quran hasnt been changed, and never will, and did you completely ignore my example?
Throw your Bibles, and all the Quraans, and then please show me which word is guarded?, Because if you throw the bibles(and i mean every single book existing today), and then tomorrow if someone wants to know about christianity, you will have no proof, but if you throw the Quraan, there are people who have memorised God Allmighties word, and they can teach their faith.
Actually if you read the Quraan you will realise that the Quraan speaks of those who write the book with their own hand and say its from God/ a revelation from God. Allaah says he will guard the message and not the books. What i mean by that is if you look back at the teachings of Abraham, Moses etc you will see how their teachings are similar to the teachings of Islaam, but not the one Man wrote with their own hands, the problem is today we dont know where are the real teachings of Abraham, Moses from the REAL scriptures, although you will find them in the Quraan!. That is the Islamic view, and not your view!
Peace