Gran Canaria height - EPSG:9397

WKT

VERTCS["Gran_Canaria_height", 
	VDATUM["Gran_Canaria"], 
	PARAMETER["Vertical_Shift", 0.0], 
	PARAMETER["Direction", 1.0], 
	UNIT["Meter", 1.0]]

WKT2

VERTCRS["Gran_Canaria_height", 
	VDATUM["Gran_Canaria"], 
	CS[vertical, 1], 
	AXIS["Gravity-related height (H)", up, 
		LENGTHUNIT["Meter", 1.0]], 
	ID["EPSG", "9397"]]

Data from @esri/proj-codes

{
  "wkid": 9397,
  "latestWkid": 9397,
  "macro": "PE_VCS_GRAN_CANARIA_HT",
  "name": "Gran_Canaria_height",
  "wkt": "VERTCS[\"Gran_Canaria_height\",VDATUM[\"Gran_Canaria\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "VERTCRS[\"Gran_Canaria_height\",VDATUM[\"Gran_Canaria\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]],ID[\"EPSG\",\"9397\"]]",
  "description": "Gran Canaria height",
  "authority": "EPSG",
  "version": "9.8.13(12.9.0)",
  "deprecated": "no",
  "areaname": "Spain - Canary Islands - Gran Canaria",
  "extent": {
    "slat": 27.68,
    "nlat": 28.23,
    "llon": -15.88,
    "rlon": -15.31
  }
}