This webpage shows evidence for the latter.
Isa 52:13 Behold, My Servant shall rule well; He shall be exalted and extolled, and be very high.
Isa 52:14 Just as many were astonished at You (so much was the disfigurement from man, His appearance and His form from the sons of mankind);
Isa 52:15 so He sprinkles from many nations; the kings shall shut their mouths at Him; for they will see that which was not told to them; yea, what they had not heard, nor understood.
Isa 53:1 Who has believed our report? And to whom is the arm of Jehovah revealed?
Isa 53:2 For He comes up before Him as a tender plant, and as a root out of a dry ground; He has no form nor majesty that we should see Him, nor an appearance that we should desire Him.
Isa 53:3 He is despised and rejected of men; a Man of sorrows, and acquainted with grief; and as it were a hiding of faces from Him, He being despised, and we esteemed Him not.
Isa 53:4 Surely He has borne our griefs, and carried our sorrows; yet we esteemed Him stricken, smitten of God, and afflicted.
Isa 53:5 But He was wounded for our transgressions; He was bruised for our iniquities; the chastisement of our peace was on Him; and with His stripes we ourselves are healed.
Isa 53:6 All we like sheep have gone astray; we have turned, each one to his own way; and Jehovah has laid on Him the iniquity of us all.
Isa 53:7 He was oppressed, and He was afflicted; yet He opened not His mouth. He is brought as a lamb to the slaughter; and as a sheep before its shearers is dumb, so He opened not His mouth.
Isa 53:8 He was taken from prison and from judgment; and who shall declare His generation? For He was cut off out of the land of the living; for the transgression of My people He was stricken.
Isa 53:9 And He put His grave with the wicked, and with a rich one in His death; although He had done no violence, nor was any deceit in His mouth.
Isa 53:10 Yet it pleased Jehovah to crush Him; to grieve Him; that He should put forth His soul as a guilt-offering. He shall see His seed, He shall prolong His days, and the will of Jehovah shall prosper in His hand.
Isa 53:11 He shall see the fruit of the travail of His soul. He shall be fully satisfied. By His knowledge shall My righteous Servant justify for many; and He shall bear their iniquities.
Isa 53:12 Therefore I will divide to Him with the great, and He shall divide the spoil with the strong; because He has poured out His soul to death; and He was counted among the transgressors; and He bore the sin of many, and made intercession for transgressors.
I know Jesus' lineage is not of Aaron, and yet Jesus is our High Priest. The Book of Hebrews teaches that Jesus is a High Priest of the order of Melchizedek:
This happened by an oath of God: