The data presented on OpenSanctions is not created by an editorial staff. Instead, it is aggregated from a variety of sources, most of which are national governments or other international organisations.
If you are listed on an international sanctions list and wish to be removed, most countries offer a complaint mechanism where you can apply to have your information removed. Below are some of the contact points for national authorities:
OpenSanctions is free for non-commercial users. Businesses must acquire a data license to use the dataset.