Verifying content distribution authority

A computer storage medium encoded with a computer program, the program comprising instructions that when executed by data processing apparatus cause the data processing apparatus to perform operations comprising:

• receiving, from a requestor, a request for broadcast content for a broadcast feed;
• specifying verification content for inclusion in the broadcast feed, the verification content being scheduled for presentation at a specified time;
• monitoring the broadcast feed for presentation of the verification content at the specified time;
• determining, from the monitoring, that the verification content was presented by the broadcast feed at the specified time;
• in response to determining that the verification content was presented by the broadcast feed at the specified time, verifying the requestor as an entity authorized to request services for the broadcast feed;
• and
• in response to verifying the requestor of the broadcast content, enabling, for the requestor, an online self-service advertisement account with which broadcast advertisements are requested.