Twitter has taken down eight Vine videos associated with the artist Prince, after his record label sent a letter warning of copyright infringement. The notice, posted on Chilling Effects last week and noticed by The Next Web today, described the Vines in question as “unauthorized recordings” and “unauthorized synchronizations.” The label, NPG Records, requested that Twitter immediately remove the Vines and any future Vines featuring Prince. The Vine is a mobile service that allows people to create and share short, looping videos. The links to the Vines in the request no longer work. A Twitter spokesman said the company doesn’t comment on individual accounts for privacy and security reasons. Instead, he pointed to Twitter’s copyright policy, which also applies to Vine.