Hexaduvo on Nostr: Maybe the flow is Nostr app (or key holding app to: sign with selected identity, the ...

Maybe the flow is Nostr app (or key holding app to:

sign with selected identity,

the app uses open timestamps to lock that signature into a specific place in time,

the signed file along with the timestamp proof back to the group you’re signing with

Optional: they repeat the process to add their signature