Hi,
As someone working in the world of municipal archives, I would suggest the open-source software Archivematica,
As per this interview on the Library of Congress blog:
http://blogs.loc.gov/thesignal/2012/10/archivematica-and-the-open-source-min...
"Archivematica is a software system that is designed to maintain standards-based, long-term access to collections of digital objects. It processes digital objects from ingest to access in compliance with the ISO-OAIS functional model. It uses a micro-services approach to invoke a number of integrated open-source tools that perform granular processing tasks such as virus checking, checksum verification, file format conversions, etc. Users monitor and control the processing workflows via a web-based dashboard. There is a brief screencast at archivematica.org that demonstrates this functionality."
A bit more technical info:
https://wiki.archivematica.org/Overview
The software is used by UNESCO, the UN Archives, NATO Archives, Library and Archives Canada, MoMA, and many others:
https://www.artefactual.com/clients/
Regards, Nick