Lostwaves
Lostwaves are a music with unknown (for searchers) artists and/or other information, such as full (original, studio) version, confirmation of existence, or the appearance on the web.
The term derives from a portmanteau of Lost and a term often given to music subcategories, Wave (ie. New Wave, Synthwave). The term gained popularity in 2019 following the search for The Most Mysterious Song On The Internet.
List
Main Article: List of Lostwaves