Loading AI Vortex evidence…
Preparing the requested public record.
Public trackerEvidence checked Jul 23, 2026 · Latest decision Jul 21, 2026Public incidents are risk signals, not usage-adjusted rates
Evidence-linked corpus record: this page is generated from the structured public record and has a publication-readiness score of 86/100. It passed the source, context, and standalone-summary checks used for public indexing; individual legal editorial review is not represented.
Concord v. Anthropic
N.D. California · May 23, 2025
CA / federalEditorial impact: mediumtrial
Direct answer
What happened in this matter?
An expert declaration submitted for Anthropic in the music-publisher copyright litigation included a footnote generated with Claude.ai that misidentified a real academic source by fabricating its title and authors. Anthropic acknowledged the uncaught error after the publishers raised it at the preliminary-injunction stage. Magistrate Judge Susan van Keulen struck the affected declaration paragraph and footnote, treating the citation error as a serious credibility issue but imposing no monetary sanction. The incident concerned an expert submission, not a party's legal brief. The cited decision identifies the court, parties, date, and disposition stated here.…
- Why the court cared
- The court narrowed the evidentiary record by striking material whose citation error undermined written-submission reliability.
- Why it matters now
- It extends verification accountability beyond lawyer briefs to expert declarations and AI-assisted citation formatting.
Why this matter is tracked
An expert declaration submitted for Anthropic in the music-publisher copyright litigation included a footnote generated with Claude.ai that misidentified a real academic source by fabricating its title and authors. Anthropic acknowledged the uncaught error after the publishers raised it at the preliminary-injunction stage. Magistrate Judge Susan van Keulen struck the affected declaration paragraph and footnote, treating the citation error as a serious credibility issue but imposing no monetary sanction. The incident concerned an expert submission, not a party's legal brief. The cited decision identifies the court, parties, date, and disposition stated here. The cited decision identifies the court, parties, date, and disposition stated here.
Operational lesson
Experts must verify AI-assisted citations; unverified AI output shatters expert credibility even in high-profile cases.
Record details
CaliforniaSingle-state evidence scope
CourtN.D. California
Jurisdictionfederal
Circuit9th Circuit
DateMay 23, 2025
CL
AI toolClaude.ai
Party typeExpert
OutcomePart of brief was struck; court took it into account as a matter of expert credibility
Known amountNot recorded
Professional sanctionNo
Attribution boundary
What the record establishes about AI use
reported
Claude.ai is recorded in the source dataset; confirm the basis in the linked document.
Procedural posture
Part of brief was struck; court took it into account as a matter of expert credibility
Correction behavior
Correction behavior is not separately verified in the current record.
Questions this record answers
- What happened in Concord v. Anthropic?
- An expert declaration submitted for Anthropic in the music-publisher copyright litigation included a footnote generated with Claude.ai that misidentified a real academic source by fabricating its title and authors. Anthropic acknowledged the uncaught error after the publishers raised it at the preliminary-injunction stage. Magistrate Judge Susan van Keulen struck the affected declaration paragraph and footnote, treating the citation error as a serious credibility issue but imposing no monetary sanction. The incident concerned an expert submission, not a party's legal brief. The cited decision identifies the court, parties, date, and disposition stated here.…
- Why does Concord v. Anthropic matter for legal AI risk?
- It extends verification accountability beyond lawyer briefs to expert declarations and AI-assisted citation formatting.
- What does the public record establish about Concord v. Anthropic?
- The docket is primary; detailed Claude attribution and partial-strike facts are corroborated by reliable legal reporting.
- Which source supports this Concord v. Anthropic summary?
- The recorded source is reason.com. It is classified as secondary or other linked source; review the linked material and subsequent docket history before relying on this summary.
Related matters
Related by court, jurisdiction, tool, or classified failure pattern. Similarity does not imply the same facts or outcome.