When my ex-wife was adopted at 6, a new BC was issued as if the adoptive parents had “given birth.” The records of her previous connection were completely, and quite legally, expunged. I think it’s probable that there is no “hidden” “real” BC. But who knows what happened in Indonesia...
Thanks for the information. I find it interesting, and troubling, that birth records can be destroyed (and not just sealed by a court).