Editor records can be verified in two different ways:
Sending "editorial receipts" (decision letters) to firstname.lastname@example.org both adds the editor record and verifies it. This is by far the simplest way to add editor records to Publons.
Via journal integration
At this point there are no automatic links between review submission systems and Publons which facilitate creation of editor records. However, partnered journals can still verify editor records via their partner dashboard. If you have unverified editor records on your profile for a partnered journal, reach out to their administrative office to request they verify those records from the partner dashboard.