About: http://webisa.webdatacommons.org/417720389

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	re opt-in and proving 'it' was CC when you acessed itThe berne convention prohibits formalities" such as the requirement to register copyright with a central 'office'... least that is the usual interpretation.
http://www.w3.org/ns/prov#wasQuotedFrom	techdirt.com