No, but if you

want to view a blockchain not as a concept to burn an arbitrary amount of energy by computing the proof of work, but rather see it as an append-only ledger, then some concepts within RESTIC are like that.

so once you have initialized the repository then you can do the first backup and there it deviates already from maybe existing backup software because the the backup workflow is very highly optimized for that it's as smooth as possible so you can just restick in it and you tell it where the repository is which may be like a local directory somewhere it asks for the password and then you can directly start backuping things.

It's just like RESTIC backup and then you pass a list of files or directories and it will start saving the data.

And in order to do that, and you can just after the backup has finished, you can just run it again and it will take just a few seconds at most.

because it has a lot of optimization going on in detecting which files have changed but also if you have the the same files over and over again or you have similar files with for example an image of some some embedded device which is several gigabytes in size and you have a second image of the same device after you've turned it on and configured it then most of the data will be the same And Rastic will read the first file, split it into blocks, and only store these blocks.

The blocks are identified by their SHA-256 sum.

honest at some points