How can I actually prove it? All I can really say is in my opinion, Jesus, the Son of the most high, really did walk on water because its just another power that people with elevated consicousness naturally possess.
So if Jesus really was the Son of the most high, a true spiritual master, a perfected being, he would by nature possess these powers, and perform many miracles.
Here's what Gautama Buddha says about iddhis or Superhuman powers:
"In the miracle of Iddhi, Iddhipatihariya (Superhuman power) the Bhikkhu experiences various kinds of power. From one form he becomes many, and from many he becomes one again; he becomes visible or invisible, passes through wall and rocks without touching them, as if they were space. He dives into and emerges from the earth as if it were water, and walks on water without disturbing the surface as if it were land; sitting crossed-legged, he moves in the sky like a bird. The Moon and the Sun in all their majesty, he touches and strokes with his hand, continuing with his body up to the realm of Brahma. When trusting person sees the Bhikkhu perform these acts, he relates it to some sceptic saying "The power and majesty of the Samana are stupendous. I saw him transforming himself from one form into many and so on." Then the sceptic says "That is the 'Gandhara charm' making the Bhikkhu perform those acts. What do you think, Kevaddha, would not the sceptic say so to the trusting one?" Kevaddha replied "He would, Sir." Thereupon, the Buddha warned "Well, seeing this advantage of the iddhi miracles, I am vexed with them; I deplore them and am disgusted with them"
Here's what the Yoga Sutras say:
"By mastery of the vital energy situated in the throat, the Yogi can float or walk on water, swamps, thorns and so forth without touching them, for this is the power of levitation and ascension." (Yoga Sutras, 3.40)