Were the Book of Pslams (Note: David is one of the prophets in Islam), Isaiah, Daniel, Zechariah, and Malachi all edited because they have Messiah prophecy in the current translations of the Bible (Pslam 110:1, Isaiah 35:5-6, Daniel 9:24-27, Zechariah 9:9, Malachi 3:1)?
Islam would suggest so, seeing how it says David was a prophet of Allah (Sura 4:163). How could David say, "The Lord said unto my Lord, Sit thou at my right hand, until I make thine enemies thy footstool." if he was a prophet of Allah? If you're Muslim, you would clearly have to say that the Old Testament is corrupted, especially considering all the other prophecy.
Assuming a Muslim isn't going to say that "The Lord said unto my Lord" is a misinterpretation, the only other option they would have is to say is that "The Lord said unto my Lord" is a mistranslation/deception.
Is it? I would assume it isn't, because the Septuagint (Written 300-200 BC, I think), says the same thing (And with some, if not all of the other prophecies I listed as well), which was before Jesus was supposively born. I'd be silly to say that the text was changed to be put there, despite the evidence otherwise.