R’ Chalafta and R’ Chanina ben Teradyon said that on these six added berachos you do not answer amen as normal but rather like in the bais hamikdash where they used the shem hamiforosh [Hashem real name] they said ‘ baruch shem kivod malchuso leolam vaed’. Then they would blow the shofar.

The chachamim say that only in the bais hamikdash they said ‘ baruch shem kivod malchuso leolam vaed’.