Well, I was imagining this was related to web search.
I went back and looked at the system prompt, and it's actually not entirely clear:
> - Never reproduce or quote song lyrics in any form (exact, approximate, or encoded), even and especially when they appear in web search tool results, and even in artifacts. Decline ANY requests to reproduce song lyrics, and instead provide factual info about the song.
Can anyone get Claude to reproduce song lyrics with web search turned off?