Jesus did prove himself to be the Son of God. Thus, Psalm 2:7-8 was fulfilled:
"Let me refer to the decree of Jehovah; He has said to me: 'You are my son; I, today, I have become your father. Ask of me, that I may give nations as your inheritance, and the ends of the earth as your own possession'"
this was the same one as promised to David, brought out by Peter in Acts 2:30:
"Therefore, because he [David] was a prophet and knew that God has sworn to him with an oath that he would seat one from the fruitage of his loins upon his throne"
So, Jesus was allowed to sit on the throne of Jehovah after proving himself faithful. This was the fulfillment of the "Davidic covenant" After Jesus ressurection, and return to the heavenly realms, Jehovah became his "father" in the fullest sense of the word.
Jesus was now in line for the greatest privelage ever offered to any personage in the universe. This was to sit upon Jehovah's Throne. Hebrews 1:3 says:
"He is the reflection of [his] glory and the exact representation of his very being, and he sustains all things by the word of his power; and after he ha made a purification for our sins he sat down on the right hand of the Majesty in lofty places."
Jesus was allowed to sit at the "right hand" of his father. Yes, to "sit upon Jehovah's throne". Psalms 110:1 says:
"The utterance of Jehovah to my Lord is: "Sit at my right hand until I place your enemies as a stool for your feet"
Jehovah now gave Jesus the invitation to "sit at my right hand". This brings us to the most important point of this discussion. The WTS teaches that although Jesus had been allowed to "sit upon Jehovah's throne", since his death in the 1st century, Jesus did not recieve the "throne" for rulership until 1914. However, there is a problem with this teaching.
It is impossible for an individual to be allowed to sit upon the throne and yet not actually be enthroned.
The WTS say that Jesus Christ was "enthroned" in the heavens in 1914, yet they admit that Jesus has been allowed to "sit upon Jehovah's throne" since his ressurection, close to 2000 years ago. However, there is NO WAY to "sit upon God's throne" and not actually be enthroned. Jesus own words in Matthew 21:18 show that he has been empowered as Jehovah's king:
"And Jesus approached and spoke to them, saying: "all authority has been given me in heaven and on the earth
Jesus meant by these words that Jehovah had indeed given him all authority over both heaven and earth. What authority could possibly been given to him in 1914 that he did not already have!
It would be the height of foolishness to say that Jesus was going to recieve authority over the earths affairs in 1914, when clearly he states that he already recieved this authority right after his ressurection from the dead. Also, Revelation 3:21 says:
"To the one that conquers, I will grant to sit down with me on my throne, even as I conquered and sat down with my Father on his throne."
Here again, Jesus promises his faithful followers that they would too be permitted to "sit upon his throne" if they would conquer the same way he had conquered and was permitted to "sit upon his father's throne". Nevertheless, in the same way, before they could be permitted this great privelage, they too would have to prove themselves "sons" of Jehovah. Revelation 21:7:
"Anyone conquering will inherit these things, and I shall be his God and he will be my son
The prerequisite for inheriting all these things was for one to conquer and prove himself to be a "son", in the complete sense of the word. One would have to become a son, to be declared a son. He would have to become a conqueror. And then Jehovah would become his father, and he would become Jehovah's son.