Using Digital Signature to Seal Engineered Drawings

I am trying to figure out how to comply with the electronic signature requirements most US states have implemented for sealing of blueprints by engineers or architects, particularly FL. I can apply a Stamp, which I have created in Acrobat with a dynamic date field to show when the Stamp was applied to the page. That does not seem to always be an acceptable form of certifying the pages digitially, however, even though Adobe asks for an Identity Setup when you begin applying the Stamp. It sounds like Digital Signature may be the best solution for this in Acrobat since not all the pages in a document always pertain to the same discipline and should be signed individually by the professionals. I am very unclear as to how the authentication works and whether the image of the seal should be part of the Digital Signature process or applied separately as a Stamp as I have been doing. Also, since Digital Signature saves the document after each page is signed, and these documents are often 20 or more pages long, is there a better way to do this?