Islamic Studies
Caliphate & Rulers: From the Rightly Guided Caliphs to the Ottoman Caliphate
What did Uthman (RA) do with the old and differing copies of the Quran?
Explanation
Uthman (RA) ordered the burning and destruction of all old and differing copies to ensure only the standardized Mushaf was used.
Reference: Islamic Studies - Caliphate & Rulers
, Page 4