When can one be considered a prophet in Judaism? What do they have to do to achieve the title of prophet? Do they have to make a predication about the future?

The minhag Chabad by netilas yadayim in the morning is to raise the hands until the peyos for the brocho al netilas yadayim. The source for the minhag is in Likutei Diburim of the previous Lubavitcher Rebbe, the Rebbe Rayatz Ztz”l. There the procedure of the Rebbe Rashab is detailed: In the morni...