createdAt property
CreatedAt is unix seconds when the claim was first recorded. It equals verifiedAt on the first proof and then stays put while verifiedAt moves, so the pair reads as "claimed since / last proven".
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
int? createdAt;