You can submit a pull request and report issues with the database content in the GitHub page of this project (cryptobib/db).
WARNING: This is probably not the repository your are interested in. This repository is only for cryptobib developers. The repositories containing the public bib files are cryptobib/export and cryptobib/export_crossref.
WARNING: This project shall only be used as a subfolder of the main project cryptobib/cryptobib. Please read the documentation of the main project.