Spotify might not be done adding trendy technology to its streaming music service. The company has confirmed that it's testing a feature which requires owning an NFT (non-fungible token) to unlock certain playlists. The band Kingship is part of a pilot that also includes organizations like Fluf, Moonbirds and Overlord. The experiment appears to be limited to Android users in certain countries, although TechCrunch notes this isn't surprising when Apple limited NFT uses on iOS in October of last year.