https://nlnet.nl/project/SSH-Stamp/
SSH Stamp looks very interesting at a glance, but there is no information about a project page or a developer. A search for it with DuckDuckGo does not find any information beyond that page. I wonder if this is real. If there is anything open source about this, it is nothing like the open source projects I know.
I'm guessing there isn't anything yet besides the proposal. Since the project start is this month. Knowing NLnet, I think there should be something soon enough.