DMP (Django Music Publisher) is open-source software for managing music metadata,
batch registration of musical works (using CWR), royalty processing and data distribution.
It was initially released in July 2018 and has been regularly upgraded ever since.
Current version 22.5 Mayday was released in May 2021.
Next version 22.1 Exofile will be released in January 2022.
Documentation: Release History
It comes with a great user manual and video tutorials.
Django Music Publisher is free. MIT License
No registration, no payment data, no BS.