ESSOAr will attempt to link the preprint DOI to the publication DOI. If the published version can be identified, a link will appear on the top of the preprint record. Services are being developed by publishers that will also indicate earlier preprint versions on the final paper. This requires the title and authors to be matched in Crossref's database. This will be most successful if you update your draft submission with later versions or revisions that accurately indicate the title. Otherwise, authors can link a publication in the preprint or poster.