Is that the sequence?
That would imply the "original document" has no seal, nor did the microfilm image, nor would a microfiche image, nor would a modern digital "image" stored on a DVD somewhere.
The "seal" would show up with a final end stage copy to be handed over to the customer paying for a copy.
Basically, that's it. Make a copy (or summary, in the case of the short form) of the record, stamp it with today's date, formally state that it is a true copy or, in the case of a short form, a true abstract, sign the statement and apply the seal. If a person requests their birth certificate multiple times, there will be different dates and possibly different registrar signatures. And possibly also different quality copies or a copy in one case and an abstract in another, all dependent on the procedures the given registry follows. But the only thing that matters is the original document.
Hopefully, the seal and signature will discourage forgery, but the ultimate authority is always what's on file at the registry. That's why forgery is only practical in situations where the original agency cannot be consulted, or at least not in time to keep the forger from getting away with whatever he's up to. When I was a kid, I had a forged draft card, made with a Polaroid print copier. Perfectly fine for buying booze, but all they'd have needed to do to catch me would have been to call the local draft board, LOL! Forgery is pointless if there is any possibility of asking the originating agency to authenticate the forgery.
Hawaii doesn't use microfilm or microfiche, as far as I've heard (maybe for backup). They keep the certificates in bound volumes. So, presumably, the procedure is find the aisle, shelf, and book covering 4 August 1961, turn to Obama's BC, xerox, and apply the certification (date, signature stamp, and seal).
Of course, as I pointed out above, now that we have the internet, strong cryptography, and SSL, there is no need. They should just put any requested documents on their website, and any person needing a birth certificate would then cite the URL instead of presenting a piece of paper, sealed or otherwise. The URL would be unforgeable and direct from the horse's mouth. No need for signatures or seals. That's all taken care of by the HTTPS protocol.
It would also give you back up in case of disaster ~ not that live on top one of the world's tallest volcanos isn't something like a disaster as it is!