So, "Ist dies dein Blut?" an acceptable statement
would Germans prefer to use "das" in this example
das is pretty widely used to introduce new material, whether it's "close" or "far".
If you must distinguish, I'd be more likely to use das hier and das da rather than dies and das.
(And jenes is completely old-fashioned. It's not much more used than "yon picture" would be in English.)