**My question is do these follow a regular pattern? **
If so they could be the patch over the bolts holes that held the forms together …poor job.
Scot. There is methods and apparatus for forming concrete.
Clips, of wire or nylon that is xx"s inches in width that break upon pressure being exerted upon them after the curing process, enough to allow the forms to be removed, is completed.
It is dependent upon the type of form and other materials the company uses.
No blots or I have not seen or heard the term bolts used…
I have seen some newer homes that have parging over the foundation is the builder giving more for the consumer or cover up…time will tell. Pic 3 looks like it might even be cement paint just by the consistency you can see a run out of a small crevice maybe home owner job? JMO