Crossref DOIs not resolving/ DOI registration failing

This incident has been resolved. All affected metadata submissions have now been reprocessed.

We continue to monitor the system to ensure stability and consistent processing of registrations.

The DOI Foundation identified the issue as a surge in traffic affecting the backend infrastructure of doi.org. This has been resolved. Crossref registration servers have been restarted, and metadata registrations are now processing successfully.

UPDATE: Crossref DOIs have not been resolving as expected since around 06:56 UTC. Any attempt to resolve them returns the error message: “DOI Cannot Connect to Server.” Some DOI registrations are impacted too. We are closely working with the DOI Foundation on a fix.

Crossref DOIs have not been resolving as expected since around 06:56 UTC. Any attempt to resolve them returns the error message: “DOI Cannot Connect to Server.” We are currently investigating the issue.