أين توجد نسخ القرآن التي نسخها عثمان بن عفان؟

The question might be about the location of the original Uthmanic codices today, which has not been definitively established. Some of the Qur'anic manuscripts currently in existence might be among them, and there are studies and manuscripts that suggest this, although the attribution of some of them to Uthman (may Allah be pleased with him) is doubted due to additions that were not present at that time.

The question might also be intended to cast doubt on the Qur'an that exists today. This is refutable by the continuous transmission (tawatur) of the Noble Qur'an through both oral and written chains of narration. The Uthmanic codices themselves were transcribed from oral transmission, and the preservation and transmission of the Noble Qur'an have continued through generations. The mushaf (Qur'anic manuscript) in circulation today is identical to what was transmitted from the Prophet (peace be upon him).