Citation Errors in Concord Music v. Anthropic Attributed to Claude AI Use by Defense Counsel

In a legal filing in Universal Music Group et al. v. Anthropic, lawyers for Anthropic acknowledged that expert witness testimony submitted in the case contained erroneous citations generated by the company's Claude AI system. The filing stated that the inaccuracies, which included incorrect article titles and author names, were not caught during manual review. Anthropic characterized the issue as an honest mistake and apologized in court.