All debts contracted and engagements entered into, before the adoption of this Constitution, shall be as valid against the United States under this Constitution, as under the Confederation.
This Constitution, and the laws of the United States which shall be made in pursuance thereof; and all treaties made, or which shall be made, under the authority of the United States, shall be the supreme law of the land; and the judges in every state shall be bound thereby, anything in the Constitution or laws of any State to the contrary notwithstanding.
The Senators and Representatives before mentioned, and the members of the several state legislatures, and all executive and judicial officers, both of the United States and of the several states, shall be bound by oath or affirmation, to support this Constitution; but no religious test shall ever be required as a qualification to any office or public trust under the United States.
If you are citing that a treaty can trump the Constitution of the United States, you are wrong.
The bolded area speaks specifically of the Constitution being the law of the land and that laws and treaties made must be made under that law.
To make a treaty that sits outside the Constitution would be in violation of the Constitution.
Also, the next line "and the judges in every state shall be bound thereby, anything in the Constitution or laws of any State to the contrary notwithstanding" speaks only about state laws and constitutions, not the Constitution, itself.
Treaties do NOT supercede the Constitution. Period.