[gemakelijk]

Blockchain would fit perfectly, since it is a write only technology. And you do get nice features at no cost like smart contract, NFTs...

[mbreese]

Umm. The blockchain is WORM technology (kinda). You write once, but it can be ready by anyone.

This is a write-only resource…

Now, you could in theory store SHA hashes on a block chain to confirm that the files were written.