From an aeronautical point of view, it’s totally irrelevant whether you are using originals or copies, as long as they are current. I believe you could even use a hand-drawing as long as it has all the official and current information on it - and still be legal.
When using “unofficial” documentation, such as Jeppesen, you should note that their liability for any claim resulting from inaccurate information is VERY limited, usually to the price of the Manual (if you screw up based on official government plates, you may receive a much higher compensation).
The copyright issue is a different one and might get you into serious trouble, especially if you are operating commercially.
happy landings