Then answer it. Disclose it to whom? Who is tasked with checking it out and determining authenticity? What does the Constitution say? Or the law?
From danamco's link
In the past, questions about Sen. John McCain's legal status have arisen. McCain was born in the Panama Canal Zone at a U.S. Army hospital. McCain had legal experts vet his constitutional qualifications, and he also disclosed a copy of his birth certificate.
Please note the experts referred to were LEGAL experts, not DOCUMENT experts. Next, they were McCain's experts, not independent experts; McCain had legal experts. So, according to your link, McCain consulted legal experts to examine his citizenship status to see if it met the Constitutional requirement for president. (I've read enough of danamco's posts to assert with confidence that he would never accept similar vetting of Obama.)
The quoted text goes on to say and he also disclosed a copy of his birth certificate. It doesn't say who he disclosed it to; it doesn't say McCain made it public, it doesn't say his birth certificate was examined by document experts and pronounced authentic; it doesn't say that a court gave his BC the official stamp of approval.
Nothing in danamco's link contradicts my claim that McCain never made his birth certificate public.
Answer the questions danamco.