So far, all libraries that we know of using Blockchain are in Chile, and their systems were put in place by Prodigio Consultores.
Here is what’s listed on their website as of 9/11/19
Proyectos en ejecución- Projects in process
Biblioteca Digital SUBDERE– Subsecretariat of Regional Development Digital Archive
Repositorio Digital SERNAGEOMIN (Servicio Nacional de Geología y Minería)- National Geology and Mining Service Digital Archive
Sistema de Biblioteca, Univ Católica de Temuco,- Catholic Univ of Temuco Library System
Biblioteca Digital DIPRES, (Hacienda)- Treasury Dep’t Digital Library
Repositorios Digitales- Digital Archives
Gaia Antartica, Repositorio Antárctico de Chile- Antarctic Archive of Chile
Repositorio Digital CEPAL, Comision Economica Para America Latina y El Caribe- Economic Commission for Latin America and the Carribbean Digital Archive
Repositorio Digital de Planeamento MOP- Ministry of Public Works Digital Planning Archive
Centro de Recursos Educarchile- Education Dep’t Resource Center
Bibliotecas Digitales- Digital Libraries
Biblioteca Digital del Gobierno de Chile- Government of Chile Digital Library
Biblioteca Digital MINEDUC (Ministerio de Educación)- Education Ministry Digital Library
Biblioteca Digital CIREN- Natural Resource Information Center Digital Library
Aike Biblioteca Digital de la Patagonia, Universidad de Magallanes, Aike Patagonian Digital Library
Biblioteca Digital DIPRES, Ministerio de Hacienda- Treasury Department Digital Library
Biblioteca Digital FIA, Federación para la Inovación Agraria– Innovation in Agriculture Federation Digital Library
Biblioteca Digital, Museo de la Memoria y Derechos Humanos- Museum of Memory and Human Rights Digital Library