Rosh Hashanah is known as the Day of Judgment where we come before the King in the merit of Yitzhaq. This merit is based on a three part formula that is known with Malchuyot (Kingship), Zichronot (Rembrance) and Shofarot (Shofar).
Malchuyot, Zichronot and Shofarot are what the Machzor (Siddur) prayers are based on. What does Malchuyot have to do with the shofar and judgment on Rosh Hashanah?
Listen, as R’ Yehezqel of Kehilat Melech Yisroel in Toronto, Ontario explains this mystery in “The Aqedah.”