Music publishers suing Anthropic PBC over its AI training want to add a claim to their copyright complaint, accusing the Claude-maker of illegally downloading sheet music from pirate sites.
Concord Music Group Inc., Universal Music Corp., and several other publishers requested permission to file an amended complaint on Tuesday arguing they only discovered Anthropic’s illegal copying through a July class certification order by Judge William Alsup in another case. That order discussed Anthropic’s use of “BitTorrent"—a tool used to quickly download large files—from a shadow library called LibGen, which the publishers said contains “over a thousand illegal copies of sheet ...