Our support team can run a quick report for you to get you a list of DOIs and the resolution URLs we have in our database. I assume the resolution URLs are what you are interested in, right? If so, just send us a message to support@crossref.org with your DOI prefix(es) and we’ll send you back a report.
Alternatively, you can also find the resolution URL for any one DOI in our REST API, using this call: