CSRN2025 (NAD83 2011) + COH88 2025 (NAVD88) height - EPSG:10920

WKT

HVCOORDSYS["CSRN2025_(NAD83_2011)_and_COH88_2025_(NAVD88)_height", 
	GEOGCS["CSRN_epoch_2025.0_(NAD83_2011)", 
		DATUM["California_Spatial_Reference_Network_epoch_2025.0_(NAD83_2011)", 
			SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	VERTCS["COH88_2025_(NAVD88)_height", 
		VDATUM["Derived_California_Orthometric_Heights_of_1988_epoch_2025"], 
		PARAMETER["Vertical_Shift", 0.0], 
		PARAMETER["Direction", 1.0], 
		UNIT["Meter", 1.0]]]

WKT2

COMPOUNDCRS["CSRN2025_(NAD83_2011)_and_COH88_2025_(NAVD88)_height", 
	GEOGCRS["CSRN_epoch_2025.0_(NAD83_2011)", 
		DATUM["California_Spatial_Reference_Network_epoch_2025.0_(NAD83_2011)", 
			ELLIPSOID["GRS_1980", 6378137.0, 298.257222101], 
			ANCHOREPOCH[2025.0]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	VERTCRS["COH88_2025_(NAVD88)_height", 
		VDATUM["Derived_California_Orthometric_Heights_of_1988_epoch_2025"], 
		CS[vertical, 1], 
		AXIS["Gravity-related height (H)", up, 
			LENGTHUNIT["Meter", 1.0]]], 
	ID["EPSG", "10920"]]

Data from @esri/proj-codes

{
  "wkid": 10920,
  "latestWkid": 10920,
  "pcsWkid": 0,
  "gcsWkid": 10910,
  "vcsWkid": 10918,
  "macro": "PE_HVC_CSRN2025_NAD83_2011_COH88_2025_NAVD88_HEIGHT",
  "name": "CSRN2025_(NAD83_2011)_and_COH88_2025_(NAVD88)_height",
  "wkt": "HVCOORDSYS[\"CSRN2025_(NAD83_2011)_and_COH88_2025_(NAVD88)_height\",GEOGCS[\"CSRN_epoch_2025.0_(NAD83_2011)\",DATUM[\"California_Spatial_Reference_Network_epoch_2025.0_(NAD83_2011)\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],VERTCS[\"COH88_2025_(NAVD88)_height\",VDATUM[\"Derived_California_Orthometric_Heights_of_1988_epoch_2025\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]]",
  "wkt2": "COMPOUNDCRS[\"CSRN2025_(NAD83_2011)_and_COH88_2025_(NAVD88)_height\",GEOGCRS[\"CSRN_epoch_2025.0_(NAD83_2011)\",DATUM[\"California_Spatial_Reference_Network_epoch_2025.0_(NAD83_2011)\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101],ANCHOREPOCH[2025.0]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],VERTCRS[\"COH88_2025_(NAVD88)_height\",VDATUM[\"Derived_California_Orthometric_Heights_of_1988_epoch_2025\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]]],ID[\"EPSG\",\"10920\"]]",
  "description": "CSRN2025 (NAD83 2011) + COH88 2025 (NAVD88) height",
  "authority": "EPSG",
  "version": "12.016(13.6.0)",
  "deprecated": "no",
  "areaname": "USA - California",
  "extent": {
    "slat": 32.53,
    "nlat": 42.01,
    "llon": -124.45,
    "rlon": -114.12
  }
}