Here is a handy plugin that lets you timestamp your WordPress content on the blockchain for copyright protection and increased trust. WordProof Timestamp automatically timestamps your blockchain and let your visitors see when and how your content has changed for transparency.
This plugin is a great tool when you need to claim copyright infringement. It creates a universal hash for your posts, pages and media files, which means you can always prove when you published the content. WordProof Timestamp is available as a free download.