The Bill Of Rights, as defined by the 9th Article, which is a legal fail-safe that declares there is no mechanism inherent in the Constitution which can be used or created to alter, deny or disparage the unalienable rights enumerated in The Bill Of Rights.
The US Constitution was the Supreme Law Of The Land from March 4, 1789, until December 14, 1791.
On December 15, 1791 - the Bill Of Rights supplanted the Constitution as Supreme Law Of The Land in perpetuity due to the legal disbarment by Article 9 of The Bill Of Rights which does not allow any legal mechanism to be used to render changes to it, meaning all other legal pervues, including the US Constitution, are permanently inferior to The Bill OF Rights.