Systems and methods for automatically verifying an identifier of a content provider are provided. A first identifier, a content item, and a uniform resource locator are received from a content provider. The domain of the uniform resource locator is determined. A plurality of second resources under the domain are accessed and stored in memory. From the plurality of second resources, a plurality of second identifiers are detected. A map of domain and a plurality of second identifiers is created. Using the map, the first identifier is compared to each of the plurality of second identifiers. If there is a match, the first identifier is approved to be used with the content item. The first identifier may be displayed on a user device with the content item.