Rolling Stone: Internet Sleuths Want to Track Down This Mystery Pop Song. They Only Have 17 Seconds of It. “Before the days of apps like Shazam, trying to identify an unfamiliar song was a team effort. WatZatSong, a social network dating back to 2006 (the early days of Web 2.0) facilitated that process on a global scale. Users could upload tracks that had stumped them, and crowdsource guesses about where it had come from. Some mysteries were swiftly solved; others were tougher to crack. But it wasn’t until 2021 that WatZatSong received what would become its most infamous and enduring submission, from a contributor in Spain going by the handle ‘carl92.'”