Look at what has lasted 500 years, and use those media. Websites are not among them.
1) stone
2) books if printed on the right kind of paper
3) metal if it's not something subject to rust
Even if it is possible to make a website that lasts 500 years, I expect we haven't figured out how yet. I'm sure it took people a while to figure out how to make long-lasting tombstones; early North American ones were often made out of sandstone or wood, and are illegible or completely gone now. You may be one of the very first people to give thought to how to make a website that will last that long; what are the odds you will get it right on the very first attempt?
It doesn't have to be fair. Things come and go. To host information for X years, statistically the things most likely to last are those that already existed for at least that amount of time.
Or you can take your chances, which, again statistically speaking, is not good if we're talking about websites lasting 500 years.
Earth is a terrible place to store things for hundreds of years. I bet you could draw your website into Moon dust and come back hundreds of years later and it would still be there right next to your footprints.
I recently saw headstones with photos on them. Now I’m thinking about writing a bunch of stuff and encoding it in a QR code on a headstone. The QR code is likely to be replaced with something else, but maybe if it says “QR Code” under it they could snap a picture and figure it out.
Based on fairly common nerd interest in old tech (see: retro gaming, for one thing), I'm pretty sure QR codes will remain a curiosity for the foreseeable future, as they certainly solve a certain use-case/problem
An alien civilization of giant lizard men that once roamed the earth whose dietary habits were superior and everyone should emulate (by buying and reading my book - "The Paleo-Plastic Diet for modern man").
1) stone 2) books if printed on the right kind of paper 3) metal if it's not something subject to rust
Even if it is possible to make a website that lasts 500 years, I expect we haven't figured out how yet. I'm sure it took people a while to figure out how to make long-lasting tombstones; early North American ones were often made out of sandstone or wood, and are illegible or completely gone now. You may be one of the very first people to give thought to how to make a website that will last that long; what are the odds you will get it right on the very first attempt?