When reading through a preprint article (which are often the most accessible versions of articles), I for various reasons want to determine whether there has been an officially published version of the article: for example for (1) a more official source to cite, (2) a more edited and cleaned up version of the preprint.
Often, I run into difficulties when searching for an officially published version: (1) the title may have changed slightly or dramatically, (2) an additional co-author may have been added, etc.
Question: What method should be used to find the (or whether there is a) published version of a preprint. Is the DOI helpful? If so, how is it used?