The DOI is a natural foreign key, look at semantic scholar and the integrations that arxiv is doing in the bottom 1/3. You are generating your own IDs, so you w

The DOI is a natural foreign key, look at semantic scholar and the integrations that arxiv is doing in the bottom 1/3. You are generating your own IDs, so you won't compose with the rest of the ecosystem. Your keys mean nothing and given a handle to a paper, they can't reference your site.