What is the ruling on the statement that the adhan of 'Uthman (may Allah be pleased with him) is a bid'ah (religious innovation) and misguidance?

Question:
The validity of the statement that the adhan of 'Uthman (may Allah be pleased with him) is a bid'ah (religious innovation) and misguidance.

Answer:
This is the bid'ah (religious innovation). He says, "This is the bid'ah." The Messenger (peace and blessings be upon him) said, "Adhere to my Sunnah and the Sunnah of the Rightly Guided Caliphs." Is 'Uthman not one of the Rightly Guided Caliphs? Is he not the third Caliph? Good. If he ordered it, it is Sunnah. The first adhan is Sunnah, like the first adhan before Fajr. That is Sunnah so that people wake up. 'Uthman ordered it when he saw that people were preoccupied with their farms and their trade, so that they would be alert for the Friday prayer and prepare for it, so it became Sunnah. Yes.
But this is how one distinguishes between the Sunnah and the bid'ah (religious innovation). Everything that is not known is bid'ah (religious innovation). Yes.