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Isn't the obvious missing technical component cryptographic hashes?

A hash can represent any resource.

IPFS, or something like it, is the missing component for long term retrieval.

EDIT: or something like https://github.com/google/trillian

Someone needs to keep around your content, too. A hash means nothing if I can't find the object that corresponds to it.

Ugh. I thought blockchain hype was dead by now. Additionally, no it's not. If zero nodes rehost and serve the content, it's not available.

A key-value store has nothing to do with blockchain.

FileCoin is a blockchain and is the incentivization layer on top of IPFS that allows users to rent hard drive space. It is intrinsically connected with IPFS.

The parent comment is still accurate. IPFS isn't a blockchain and shouldn't be dismissed for this use case, which is more or less what it was designed for.

Filecoin is just for incentives, but IPFS has been running for years without it.

I had no intention of bring up "blockchain", only that cryptographic hashes must play an important part of any archival scheme intended to last generations.

Otherwise you must trust that an archiver hasn't changed history. Why trust when you can verify?

Where is someone generations hence going to get the hash from?

From the link they clicked on. The article is about link rot, not search.

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