The present disclosure provides for improved computational efficiency in systems used to provide content over a network. Hybrid content sourcing is enabled to provide content via a Content Distribution System (CDN) and a centralized service in conjunction with one another via a single URL provided to client devices. Client devices are provided with expiration tokens, which are used to authorize the CDN to request and serve the content to the client devices with the security inherent to the centralized service. Tenants are thereby enabled to use the CDN as an available source via a single Uniform Resource Locator provided to clients with greater security than public CDNs.