CGVD28(HTv2.0) height - EPSG:10588

WKT

VERTCS["CGVD28(HTv2_0)_height", 
	VDATUM["Canadian_Geodetic_Vertical_Datum_of_1928_(Height_Transformation_version_2_0)"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["CGVD28(HTv2_0)_height", 
	VDATUM["Canadian_Geodetic_Vertical_Datum_of_1928_(Height_Transformation_version_2_0)", 
		ANCHOREPOCH[1997.0]], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "10588"]]

Data from @esri/proj-codes

{
  "wkid": 10588,
  "latestWkid": 10588,
  "macro": "PE_VCS_CGVD28_HTV2_HEIGHT",
  "name": "CGVD28(HTv2_0)_height",
  "wkt": "VERTCS[\"CGVD28(HTv2_0)_height\",VDATUM[\"Canadian_Geodetic_Vertical_Datum_of_1928_(Height_Transformation_version_2_0)\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"CGVD28(HTv2_0)_height\",VDATUM[\"Canadian_Geodetic_Vertical_Datum_of_1928_(Height_Transformation_version_2_0)\",ANCHOREPOCH[1997.0]],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"10588\"]]",
  "description": "CGVD28(HTv2.0) height",
  "authority": "EPSG",
  "version": "11.018(13.5.0)",
  "deprecated": "no",
  "areaname": "Canada - CGVD28(HTv2.0)",
  "extent": {
    "slat": 41,
    "nlat": 84,
    "llon": -141.01,
    "rlon": -48
  }
}