Which statement in revelation 22 stresses the accuracy of the prophecies in revelation

I think theres 2 that you could argue.

Revelation 22:6

[6] And he said unto me, These sayings are faithful and true: and the Lord God of the holy prophets sent his angel to shew unto his servants the things which must shortly be done.

This says that the prophesies are true and God has sent his angle to prepare for them to come true.

Revelation 22:16

[16] I Jesus have sent mine angel to testify unto you these things in the churches. I am the root and the offspring of David, and the bright and morning star.

This again says that Jesus has sent an angel to prepare the world for the prophesies.

the answer is a) the proclamation of 1763.

i think it was   tsar alexander ii