In response to the increasing need for efficientESG verification, we propose an innovativeNLP framework that automates the evaluationof corporate sustainability claims. Ourmethod integrates Retrieval-Augmented Generation,Chain-of-Thought reasoning, and structuredprompt engineering to effectively processand classify diverse, multilingual ESG disclosures.Evaluated under the SemEval-2025PromiseEval competition, our system achievedtop-tier performance—securing first place onthe public English leaderboard, excelling in theFrench track, and delivering marked improvementsover conventional machine learning approaches.These results highlight the framework’spotential to offer a scalable, transparent,and robust solution for corporate ESG assessment.