The receivedAt timestamp on a ChainOfCustody is typically reported back to you by the laboratory on their sample receipt form. It marks the moment custody transferred from the carrier to the lab and is the reference point for confirming that cooler temperature, seal integrity, and sample condition were within acceptable limits at receipt. Combined with collectionDate, it establishes the total elapsed time before analysis began, which feeds into holding-time calculations.
Technical section
Data model, API, and internals — visible to developers.