Tim contributed to the contentauth/c2pa-rs repository, focusing on backend development in Rust over a two-month period. He enhanced signer workflow flexibility by introducing CAWG roles support and optional parameters for transcoded and repackaged actions, improving both governance and integration readiness. Tim also strengthened the signing pipeline by refining parameter validation and error handling, reducing misconfiguration risks. In the following month, he implemented CoseSign1-based timestamp verification, addressing cryptographic accuracy and compliance with C2PA specifications. His work demonstrated depth in secure workflow design and cryptographic validation, leveraging Rust’s strengths to deliver robust, maintainable features without introducing new bugs during the period.