Regarding the multisig: Is it possible for a government to, say, point a gun at your head, and seize the bitcoin, even if the holder of the note remains safely out of their reach?
No, this is a super important question to us as we don't want to hold Bitcoin key material.
The encrypted key on the note can only be used in conjunction with the user key on the note. If we go away or our servers are seized, then in 2029 the user key on the note can access the funds without needing to decrypt the second key on the note.
The encrypted key on the note can only be used in conjunction with the user key on the note. If we go away or our servers are seized, then in 2029 the user key on the note can access the funds without needing to decrypt the second key on the note.