OpenChain

OpenChain is an initiative within the Linux Foundation that defines a standard for open source license compliance across the software supply chain. Its aim is to help organizations verify that the open source components they use, modify, redistribute, or ship comply with licensing obligations, while reducing the risk of license violations and promoting trust in software supply chains. OpenChain provides a specification and a conformance program that organizations can implement to demonstrate compliance.

The core element of OpenChain is the Minimum Conformance Requirements (MCRs). The MCRs specify the essential policies, processes, roles, training, and documentation needed for conformance. The specification is designed to be lightweight and scalable for a range of organizations, from small teams to large enterprises, and it accommodates different development models and supply chain relationships. Compliance artifacts may include a policy document, a software bill of materials (SBOM) or inventory, license and provenance information, and training records. The project also encourages the use of common industry practices such as SPDX license identifiers.

OpenChain was launched by the Linux Foundation in 2016. Since then, it has been adopted by many organizations across various sectors, with participating companies and contributors providing guidance to evolve the conformance program. Governance is provided through a steering committee and working groups under the Linux Foundation, with input from member companies and open-source communities. OpenChain aims to streamline open source management, reduce risk, and promote transparency in software supply chains.