The phrase "true origin" refers to the real or genuine beginning or source of something. It implies finding or understanding the most accurate or authentic explanation or background of an object, idea, or event. Full definition
Not to mention to the surprising true origin of one of the heroes is mentioned; yet never fully explained or spoken of again. (slickstermagazine.com)
Honest Farm, meaning honest ingredients with true origin, and 3. (berriesinthesnow.com)
This imagined version of how copyright came to be is a story we tell ourselves to justify an inherited practice whose true origins have been forgotten. (slaw.ca)