What were the accusations made against Jesus?

BlasphemyMatthew 26:63 But Jesus held his peace, And the high priest ed and said unto him, I adjure thee by the living God, that thou tell us whether thou be the Christ, the Son of God.

26:64 Jesus saith unto him, Thou hast said: nevertheless I say unto you, Hereafter shall ye see the Son of man sitting on the right hand of power, and coming in the clouds of heaven.

26:65 Then the high priest rent his clothes, saying, He hath spoken blasphemy; what further need have we of witnesses? behold, now ye have heard his blasphemy.

Luke 22:67 Art thou the Christ? tell us. And he said unto them, If I tell you, ye will not believe:

22:68 And if I also ask you, ye will not me, nor let me go.

22:69 Hereafter shall the Son of man sit on the right hand of the power of God.

22:70 Then said they all, Art thou then the Son of God? And he said unto them, Ye say that I am.

22:71 And they said, What need we any further witness? for we ourselves have heard of his own mouth.

Mark 4:61 But he held his peace, and ed nothing. Again the high priest asked him, and said unto him, Art thou the Christ, the Son of the Blessed?

14:62 And Jesus said, I am: and ye shall see the Son of man sitting on the right hand of power, and coming in the clouds of heaven.

14:63 Then the high priest rent his clothes, and saith, What need we any further witnesses?

14:64 Ye have heard the blasphemy: what think ye? And they all condemned him to be guilty of death.

The blasphemy which Jesus was supposed to have uttered related to His claim to deity, which the High Priest of course rejected. For a man to claim to be God would of course be indeed blasphemy. But from the lips of Jesus it was the utter truth.