I'm not clear what you mean by "reused what I saw in OSM". You probably can get by with comparing google maps to OSM, but if there is any difference you need to physically go to the error location yourself and see what is really there.
It is common for map makers to intentionally put a few errors on their maps, if those errors appear in someone else's map that is proof of a copyright violation. The location and names of roads is a fact that cannot by copyrighted, but errors are a creative work that is subject to copyright. I first heard about this in the 1980's when map meant paper, I suspect google is doing the same thing in some form.
It is common for map makers to intentionally put a few errors on their maps, if those errors appear in someone else's map that is proof of a copyright violation. The location and names of roads is a fact that cannot by copyrighted, but errors are a creative work that is subject to copyright. I first heard about this in the 1980's when map meant paper, I suspect google is doing the same thing in some form.