Watchman

If you claim to be a watchman and admit that we are living during the biblical period called the new testament, then you are per definition a prophet.

Luke 12:54-56 KJV And he said also to the people, When ye see a cloud rise out of the west, straightway ye say, There cometh a shower; and so it is. [55] And when ye see the south wind blow, ye say, There will be heat; and it cometh to pass. [56] Ye hypocrites, ye can discern the face of the sky and of the earth; but how is it that ye do not discern this time?

Because the prophet is the one who recognises the times we are in.

Watchman on the other hand is an old testament term.