As a writer who publishes regularly on the web, I just keep the edit history of my longer articles on my github. Its not perfect and you can never really prove you wrote something unless you do it in front of an observer watching you write in real life imo. At some point though, you have to make a choice between not wanting to waste people's and your readers' time but also privacy and additional effort. One of my recent blogs: https://decodingvibes.com/blog/what-we-talk-about-when-we-ta...