[AM initial node] ---------(time window expired)--> [AM locked node ]
   |           |
   |         (valid unlock phrase to update node)
   |           |
   |           v
   |   [AM updated node] --(time window expired)--> [AM locked node ]
   |      |   |      ^
   |      |   v      |
   |      | (valid unlock phrase to update node)
   |      |
(valid unlock phrase to claim ownership)
   |
   v
[USER claimed node] (behaves like any regular user node)