The register distinguishes accession date, object age, origin sequence, recovery order, estimated frame-of-origin date, and the date on which any of those facts became safe to know. These may all be different. Cross-frame chronology reconciles them, maintains evidence for discrepancies, and produces public records simplified only where simplification does not mislead.
Chronology teams reconcile instrument-derived dates with witness sequence, threshold logs, and calendars that may be incommensurable with one another. Inconsistent dates are kept in the object record rather than resolved by selection; where an accession has two defensible ages, both are held with the evidence for each, and where an object appears to pre-date its own materials, the fact is recorded without editorial comment.
Public records use simplified dates calibrated to a single reference frame and marked as such. Full chronological records, including the fields that remain conditionally accurate or open, are available to researchers through the Archive.
Chronology teams reconcile instrument-derived dates — decay-sequence assays, frame-calibrated chronometry, and growth-analogue dating where organic analogues exist, each expressed against the Meridian Standard — with witness sequence, threshold logs, and calendars that may be incommensurable with each other.
Inconsistent dates are retained in the object record rather than resolved by selection. Where an object has two defensible ages, both are recorded with the evidence for each. Where an object appears to pre-date its own materials, this is noted without editorial comment.
Public records use simplified dates calibrated to a single reference frame and marked as such. Researchers requiring full chronological records may request access through the Archive, with the understanding that some date fields are conditionally accurate and several remain open.