Am I able to use copyrighted music inside my podcast?

The short answer is: Not without express permission of the copyright holder(s). RSS.com is responsible for the storage of your content. You are solely responsible for securing the appropriate licensing for any content someone else may have legal rights to. As discussed in our Terms of Service:

You are solely responsible for your account, the activity that occurs while signed in to your account or are otherwise using the Site, for any content, information or other materials submitted by you or on your behalf, and for any content, information, or other materials we may host or publish on the Site on your behalf. You agree not to post any content, information, or other materials to the Site if you are not the owner of or do not have all required rights, licenses, and permissions to publish, distribute, host, or otherwise use in connection with the Site.

If you choose to activate distribution on your RSS.com page, your podcast will be available on various directories like Spotify and Apple Podcasts. Each service has their own rules and policies for content. Directories have the right to remove any content from their platform that violates their policies. For this reason, if you decide to submit your feed to different podcast platforms (such as Spotify or iTunes), each site may have different copyright licenses.

At RSS.com we encourage our users to stick on the side of caution and use music for commercial use or music in the public domain covered by most copyright policies if your podcast will directly or indirectly generate revenue.

We have a post on our blog about the best places to get free music that you can use in your podcast without a problem.

If you decide to use copyrighted music, you will risk having your podcast removed, as many record companies have tools to automatically detect their respective music.

We suggest researching "fair use" and copyright licenses and/or contacting a competent legal professional.