"The Quranic canon is the form of the Quran as recited and written in which it is religiously binding for the Muslim community. This canonical corpus is closed and fixed in the sense that nothing in the Quran can be changed or modified. The process of canonization ended under the third caliph, Uthman ibn Affan (r. 23/644–35/655), which was about twenty years after the death of the Muhammad"
Edit, most of it is hearsay any way:
Zaid ibn Thabit, Muhammad's primary scribe, was assigned the duty of gathering all of the Quranic text. He gives an insight into what happened during the meeting between Abu Bakr, Umar, and himself:
"Abu Bakr sent for me at a time when the Yamama battles had witnessed the martyrdom of numerous Companions. I found 'Umar bin al-Khattab with him. Abu Bakr began, Umar has just come to me and said, 'In the Yamama battles death has dealt most severely with the qurra',[Reciters of the Quran] and I fear it will deal with them with equal severity in other theatres of war. As a result much of the Quran will be gone. “ 'I am therefore of the opinion that you should command the Quran be collected.'" Abu Bakr continued, "I said to 'Umar, 'How can we embark on what the Prophet never did?' 'Umar replied that it was a good deed regardless, and he did not cease replying to my scruples until Allah reconciled me to the undertaking, and I became of the same mind as him. Zaid, you are young and intelligent, you used to record the revelations for the Muhammad, and we know nothing to your discredit. So pursue the Quran and collect it together." By Allah, had they asked me to move a mountain it could not have been weightier than what they requested of me now”. (Al-Bukhari, Sahih,Jam'i al-Qur'an, hadith no. 4986; see also Ibn Abu Dawud, al-Masahif, pp. 6-9)"
The person ordered to compile the Quran by Abu Bakar said:
...By Allah, if he (Abu Bakr) had ordered me to shift one of the mountains it would not have been harder for me than what he had ordered me concerning the collection of the Quran... So I started locating the Quranic material and collecting it from parchments, scapula, leafstalks of date palms and from the memories of men.[Bukhari Sahih al-Bukhari, 6:60:201]
"So I started looking for the Holy quran and collected it from (what was written on) palm-leaf stalks, thin white stones, and also from men who knew it by heart, until I found the last verse of Surat at-Tauba (repentance) with Abi Khuzaima al-Ansari, and I did not find it with anybody other than him. (Sahih al-Bukhari, Vol. 6, p. 478).[23]
Indeed, so compared to the Bible there is small room for argument against canonization. It is still there, but the textual evidence (what would be necessary for this) vanishes abruptly before the Uthman version.
I assume you mean "hearsay" ("information that was heard by one person about another"), rather than "heresy" ("A doctrine held by a member of a religion at variance with established religious beliefs")? Use of the latter term by accident might be a little unfortunate given the nature of the topic :)
Ok, we edited it for you to correct "heresy" to "hearsay". Seems like an important correction in a thread about religious text. (If you don't want this change, let us know and we'll revert it.)
"The Quranic canon is the form of the Quran as recited and written in which it is religiously binding for the Muslim community. This canonical corpus is closed and fixed in the sense that nothing in the Quran can be changed or modified. The process of canonization ended under the third caliph, Uthman ibn Affan (r. 23/644–35/655), which was about twenty years after the death of the Muhammad"
Edit, most of it is hearsay any way:
Zaid ibn Thabit, Muhammad's primary scribe, was assigned the duty of gathering all of the Quranic text. He gives an insight into what happened during the meeting between Abu Bakr, Umar, and himself:
"Abu Bakr sent for me at a time when the Yamama battles had witnessed the martyrdom of numerous Companions. I found 'Umar bin al-Khattab with him. Abu Bakr began, Umar has just come to me and said, 'In the Yamama battles death has dealt most severely with the qurra',[Reciters of the Quran] and I fear it will deal with them with equal severity in other theatres of war. As a result much of the Quran will be gone. “ 'I am therefore of the opinion that you should command the Quran be collected.'" Abu Bakr continued, "I said to 'Umar, 'How can we embark on what the Prophet never did?' 'Umar replied that it was a good deed regardless, and he did not cease replying to my scruples until Allah reconciled me to the undertaking, and I became of the same mind as him. Zaid, you are young and intelligent, you used to record the revelations for the Muhammad, and we know nothing to your discredit. So pursue the Quran and collect it together." By Allah, had they asked me to move a mountain it could not have been weightier than what they requested of me now”. (Al-Bukhari, Sahih,Jam'i al-Qur'an, hadith no. 4986; see also Ibn Abu Dawud, al-Masahif, pp. 6-9)"
The person ordered to compile the Quran by Abu Bakar said:
...By Allah, if he (Abu Bakr) had ordered me to shift one of the mountains it would not have been harder for me than what he had ordered me concerning the collection of the Quran... So I started locating the Quranic material and collecting it from parchments, scapula, leafstalks of date palms and from the memories of men.[Bukhari Sahih al-Bukhari, 6:60:201]
"So I started looking for the Holy quran and collected it from (what was written on) palm-leaf stalks, thin white stones, and also from men who knew it by heart, until I found the last verse of Surat at-Tauba (repentance) with Abi Khuzaima al-Ansari, and I did not find it with anybody other than him. (Sahih al-Bukhari, Vol. 6, p. 478).[23]