Well, the monitor in front of your face is not a concept(at least I think so), but rights and truth are.
Sure it is, and it requires a substantial amount of ideation, both for me to recognize what class of thing it is, and for the designers to have produced it. The concreteness of a particular manifestation of a thing is no sure measure of its objective existence. I'm convinced of the objective existence of the law of gravity outside of human perception of it, for instance. I am less sure about rights and truth having cooresponding objective manifestation outside the realm of human perception, but I am open to demonstration, as soon as anyone can think of a persuasvie experiment.
Neither can exist unless embodied. rights are statements about relations between people. Number is a construct that begins with the counting of objects. You cannot give me an example of a truth that exists independently of examples. You can assert that it can but the moment you try to explain it you fall back on examples.