1. A method, comprising: receiving a digital content file for transmission across a distributed computer network, wherein the distributed computer network comprises an intermediate node; examining data comprising the content file to determine whether the content file includes a restricted data format, the examining performed by the intermediate node within the distributed computer network; transmitting the content file to a computer system comprising one or more endpoints when data comprising the content file does not include the restricted data format, wherein the computer system is located external to the distributed computer network; and blocking transmission of the content file when data comprising the content file does include the restricted data format to prevent unauthorized downloading of copyrighted material, wherein the blocking is effected prior to a transmission of the content file to the computer system.