A song played at several Donald Trump rallies and speeches that has become known as a QAnon anthem has been removed from YouTube and Spotify after the creator of the song claimed that it was used by Trump and others without proper permissions.

In an email to NBC News, composer Will Van De Crommert wrote that he was “exploring legal options” and that “this particular track, which was originally entitled Mirrors, is available to license online. I however was not notified of any licenses for political rallies, nor did I authorize such use.”

A YouTube representative said in an email Monday that the company “removed the video in question for violating our harassment policy, which prohibits content targeting someone by suggesting they’re complicit in a conspiracy theory used to justify real-world violence, such as QAnon.”

A Spotify representative said that “the content in question was removed following an infringement claim.”

Van De Crommert is a composer who uploads music online, where it is available to license. His music has been used by CBS and NBC (NBC is owned by NBCUniversal, the parent company of NBC News). He first released the song “Mirrors” in 2019 and uploaded it to various platforms. The song is a sweeping and somber composition with no lyrics.

The song was uploaded to YouTube and Spotify in 2020 by a different user with the screen name “Richard Feelgood” under the title “Wwg1wga,” which is short for the QAnon conspiracy theory slogan “Where we go one we go all,” alongside other uploads with QAnon names. That user did not respond to a request for comment.