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A paper's id_slug (rrxiv:YYMM.NNNNN) is minted once at first submission and inherited unchanged by every subsequent revision in the same lineage. The internal paper_id differs per version, but the slug is the citable handle. This is how a URL like rrxiv.com/papers/rrxiv:2605.00001 resolves to the latest revision of the whitepaper regardless of which version one cites.