No, actually he isn't. That's something you're reading into the text.
You might note that none of the OT deuterocanon is prophetic literature (like, e.g., Isaiah); it's all either wisdom literature or historical. Hence, none of its authors were prophets, (and none, AFAIK, were martyred), hence none of them could be classed with the "blood of all the prophets".
The passage says nothing about the OT canon, which is a concept which didn't even really exist at that time. (The formal Jewish condemnation of the OT deuterocanon took place after AD 135.) The closest thing to it would be the books that were translated in the Septuagint (which is the Greek Bible the NT authors quote, often word for word), which included the OT deuterocanon.
Of course it did...And Jesus acknowledged it did...
(The formal Jewish condemnation of the OT deuterocanon took place after AD 135.)
So what??? They finally got together and agreed that your extra books didn't belong in there...
The closest thing to it would be the books that were translated in the Septuagint (which is the Greek Bible the NT authors quote, often word for word), which included the OT deuterocanon.
There is no evidence that the Septuatgint WAS NOT invented by Origen, or more probably Eusibius centuries later...