Hi @tmrozewski and @AhemNason,
My name is Isaac. I’m the technical support manager here at Crossref. Mike’s right about our thinking on preprints. Every new version of a preprint should be registered with a new DOI, since that version of the preprint should and will be cited differently than its precursor(s). And the preprint DOIs should not resolve to the final version of record of that article.
We do recommend that each of those versions be connected to the version of record, when it is registered, using the isPreprintOf and hasPreprint relations as documented here: Structural metadata - Crossref
And here’s an example of how that is reflected in the XML: https://www.crossref.org/education/content-registration/recommendations-by-content-type/posted-content-includes-preprints/#00092
My best,
Isaac