Keep unknown facts empty. Entering text does not verify that it is agreed or correct.
Keep standard/dedicated and content responsibilities explicit.
Record each purchased issue separately, including unknown dates.
Preserve the authorized send record, sent-issue material or report and identify its source. A web view alone is not a sending record.
Identify the publication and actual issue/date/instant basis. Separate record timestamp from reported sending time; email-client appearance is optional context, not a website device promise.
Name only what the source supports: issue identity, reported sending or email appearance. Recipient delivery and readership require their own support.
Keep sender-reported metrics, report definitions, recipient delivery and human readership distinct. Do not impose a website continuous-exposure requirement.