From [0]: "The registry is a list of recognised issuers with their certificate store addresses. Certificates from these issuers can be recognised and verified by our viewer."<p>This does not look very de-centralized to me at all. In fact, the traditional methods (X.509-signed documents) are actually more decentralized -- at least you have an option of multiple CAs, instead of the single CA OpenCerts has.<p>[0] <a href="https://opencerts.io/registry/" rel="nofollow">https://opencerts.io/registry/</a>