As far as I know, GrapheneOS is a fork of Copperhead and broadly understood as its successor.
https://twitter.com/DanielMicay/status/1171170734380654597…
(Daniel Micay/Graphene accuses James Donaldson/Copperhead of scam/fraud but please DYOR!)
GrapheneOS is not a fork. It is the original open source project, continued since 2014, a year before Copperhead was founded. See https://grapheneos.org/#history for an overview of the history. Everything there can be confirmed, either via public info or multiple trustworthy people.
You can see that the project was renamed to GrapheneOS on GitHub from the network graph: https://github.com/GrapheneOS/platform_manifest/network/members…. The new CopperheadOS organization and repositories on GitHub were created in mid-2018 based on forking the legacy branch of our work. That's not the original project.
There are many people able to back up that he's a scam artist perpetrating fraud and attacks against myself, GrapheneOS and multiple other open source developers including this one:
https://renlord.com/posts/2020-03-25-copperheados-legal-threat/…
You folks need to stop providing the support needed to cause harm to us.