OpenPGP keys filter lists maintained by CIRCL. These OpenPGP key lists allow software developers, security analysts or operators to filter OpenPGP keys based on the filter list following the respective category.
There are currently 3 categories of filter list:
A list of trusted OpenPGP key fingerprints.
A list of abused OpenPGP key fingerprints (e.g. such as fake keys, short key-id collision).
A list of OpenPGP key fingerprints where the owners requested a removal due to privacy reasons.
You can either propose a pull-request to the repository (which will be evaluated by CIRCL) or you can directly contact CIRCL.