I can have bank accounts in multiple jurisdictions. If I print off the private key and send it to a safety deposit box in Canada are the BTC still under Americ

I can have bank accounts in multiple jurisdictions. If I print off the private key and send it to a safety deposit box in Canada are the BTC still under American jurisdiction? An institution could maintain copies of the keys in multiple jurisdictions for business continuity purposes. If push came to shove it would be tough to ascertain when the BTC moved borders.