I do like the idea of a digest of the article being put into the blockchain: it makes it impossible for sneaky edits or removal/denial of content at a later dat

I do like the idea of a digest of the article being put into the blockchain: it makes it impossible for sneaky edits or removal/denial of content at a later date. When you hit publish, you better be prepared for that article to exist undeniably for eternity. I'd like to see a twitter with the same features. Of course, blockchain isn't absolutely necessary here. You could sign a post with PGP 20 years ago and achieve the same.