In some aspects, a verification exchange system transforms consumer data (e.g., employment or income data) from different contributor computing systems to a standardized format and stores this standardized data in a consumer-status verification repository. The verification exchange system can selectively provide portions of the consumer data to authorized client system via a security portal to a public network. For example, the verification exchange system can use standardized consumer data to service verification queries requesting confirmation of employment or income level for consumers. The verification exchange system can do so by ensuring that a verifier system from which the query is received has provided a valid credential. In another example, the verification exchange system can restrict access to the standardized consumer data to accessors that are (i) an originating contributor computing system for the employment or income data or (ii) consumers described by the standardized employment or income data.