A UCC-1 is a form that acts as kind of a public declaration that you’ve loaned someone money or property and they’re indebted to you. It helps establish the relative priority of creditors in complex financial situations, and serves as a public record of liens on the collateral of loans. Something like that, I’m not an expert.
But it’s just a public record of a debt, basically. That debt has to actually exist, though, for the form to have any meaning. These guys have all convinced each other that just by saying they’re a creditor to the government or whoever via this form, that they can make it come true, and thereby conjure money or ownership rights out of nowhere.