Author Contact Information Intake Page
Bartz v. Anthropic PBC is a class action lawsuit under the Copyright Act brought by authors on behalf of copyright holders against Anthropic PBC, an AI company. The Class of copyright holders — consisting of authors and publishers – claims that Anthropic took books from pirate websites Library Genesis (“LibGen”) and Pirate Library Mirror (“PiLiMi”) without authorization.
The Court recently certified a LibGen & PiLiMi Pirated Books Class made up of all legal or beneficial owners of the exclusive right to reproduce any ISBN- or ASIN-bearing book that Anthropic copied from the two pirate sites. The Class’s claims are scheduled for trial on December 1, 2025.
Why We Are Collecting Your Information
Judge Alsup has ordered Plaintiffs’ counsel to provide official class notice by first-class mail and e-mail. To accomplish this, we are collecting mailing addresses and e-mail contacts for as many authors and publishers as possible. This webpage is not the official court-approved notice. It is a voluntary tool to submit your preferred contact information so we can ensure you receive the formal notice when it is sent if you are a member of the Class.
Submitting your information here does not make you a member of the Class. But, if you are a member of the class, submitting your information will help us direct formal notice of the class action at the appropriate time.
What Happens When You Submit Your Information
- Your name, mailing address, and e-mail will be stored on a secure database maintained by Plaintiffs’ counsel.
- The information will be used only for providing court-authorized notices and other case-related communications.
- It will not be shared with Anthropic, any third party, or the public.
- Submitting your information does not make you a client of Plaintiffs’ counsel and does not affect your legal rights in any way.
Confidentiality Assurance
The contact information you provide will never be sold or used for marketing.
Ready to Provide Your Contact Information?
If you believe Anthropic may have downloaded your book from LibGen or PiLiMi, please complete the secure form below.
If you are indeed a member of the class, you will receive formal notice later this year.
Thank you for helping us keep the class informed.
Plaintiffs’ Co-Lead Class Counsel
Lieff Cabraser Heimann & Bernstein LLP
Susman Godfrey LLP
Court Documents
- First Amended Complaint
U.S District Court
December 4, 2024 - Summary Judgment Order
U.S. District Court
June 23, 2025 - Order on Class Certification
U.S. District Court
July 17, 2025
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