Perhaps that would be a good first step then. Figure out how Shazam works, then create a standalone application that catalogues and recognizes the audio of advertisements. An obvious name for such an app would be along the lines of “IsAnAd?”. Then hook that standalone application up to a podcast aggregation client and use the timestamps of that to create the desired sponsor block functionality.
Thanks again. Just hashing this out with others like yourself has been super helpful.