The local city government of Buenos Aires is launching a digital ID service that utilizes blockchain technology for storing marriage and death certificates.

The decentralized digital identity protocol uses an application built on Matter Labs’ zkSync Era rollup. Known as QuarkID, it relies partly on technology from the Argentina-based startup Extrimian.

Starting in October, Buenos Aires residents can download the QuarkID wallet and claim personal identification documents, such as birth and marriage certificates.

The local government plans to roll out more official identity-related credentials on QuarkID over the coming months. In November, proof of income, certificates of academic attendance, and benefit claim documents will also become available to for download and storage on the …