Too Long; Didn't Read
Timestamped documents are now the norm in supplying evidence of ownership in an environment where any text, picture, meme, video, or other creation can be tweaked and reposted for traffic and monetization. The owner of an original electronic product can reap all these benefits - provided they have backed up the evidence of its creation. The author can send a copy of the document to themselves, to make the email’s timestamp known, however. Malicious actors could try to spoof the date to present evidence of earlier ownership.