"International Monitoring System (IMS) and Communications infrastructure
The IMS, when completed, will consist of
50 primary and 120 auxiliary seismic monitoring stations.
11 hydro-acoustic stations detecting acoustic waves in the oceans.
60 infra-sound stations using microbarographs (acoustic pressure sensors) to detect very low-frequency sound waves.
80 radionuclide stations using air samplers to detect radioactive particles released from atmospheric explosions and/or vented from underground or under-water explosions.
16 radionuclide laboratories for analysis of samples from the radionuclide stations.
...
States Parties will have equal and direct access to all IMS data, raw or processed, for verification as well as civilian uses. The Preparatory Commission has started the building and verification of the system of which as of 2023 about 90% was operational."
Ja. Da gibt es ein komplettes Nachweissystem.