About: http://webisa.webdatacommons.org/280701936

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	While the request itself is absurd, and you cannot have a reasonably-done legal proof that a person A checked the checkbox when filling a form, there is a question inside your question which can be actually answered:
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com