BBT2000 BBT-TM - EPSG:10477

WKT

PROJCS["BBT2000_BBT-TM", 
	GEOGCS["BBT2000", 
		DATUM["Brenner_Base_Tunnel_2000", 
			SPHEROID["WGS_1984", 6378137.0, 298.257223563]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Transverse_Mercator"], 
	PARAMETER["False_Easting", 20000.0], 
	PARAMETER["False_Northing", 100000.0], 
	PARAMETER["Central_Meridian", 11.52849375], 
	PARAMETER["Scale_Factor", 1.000121], 
	PARAMETER["Latitude_Of_Origin", 46.98077630555556], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["BBT2000_BBT-TM", 
	BASEGEOGCRS["BBT2000", 
		DATUM["Brenner_Base_Tunnel_2000", 
			ELLIPSOID["WGS_1984", 6378137.0, 298.257223563]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Transverse_Mercator", 
		METHOD["Transverse_Mercator"], 
		PARAMETER["False_Easting", 20000.0], 
		PARAMETER["False_Northing", 100000.0], 
		PARAMETER["Central_Meridian", 11.52849375], 
		PARAMETER["Scale_Factor", 1.000121], 
		PARAMETER["Latitude_Of_Origin", 46.98077630555556]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "10477"]]

Data from @esri/proj-codes

{
  "wkid": 10477,
  "latestWkid": 10477,
  "gcsWkid": 10475,
  "macro": "PE_PCS_BBT2000_BBT_TM",
  "name": "BBT2000_BBT-TM",
  "wkt": "PROJCS[\"BBT2000_BBT-TM\",GEOGCS[\"BBT2000\",DATUM[\"Brenner_Base_Tunnel_2000\",SPHEROID[\"WGS_1984\",6378137.0,298.257223563]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",20000.0],PARAMETER[\"False_Northing\",100000.0],PARAMETER[\"Central_Meridian\",11.52849375],PARAMETER[\"Scale_Factor\",1.000121],PARAMETER[\"Latitude_Of_Origin\",46.98077630555556],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"BBT2000_BBT-TM\",BASEGEOGCRS[\"BBT2000\",DATUM[\"Brenner_Base_Tunnel_2000\",ELLIPSOID[\"WGS_1984\",6378137.0,298.257223563]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Transverse_Mercator\",METHOD[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",20000.0],PARAMETER[\"False_Northing\",100000.0],PARAMETER[\"Central_Meridian\",11.52849375],PARAMETER[\"Scale_Factor\",1.000121],PARAMETER[\"Latitude_Of_Origin\",46.98077630555556]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"10477\"]]",
  "description": "BBT2000 BBT-TM",
  "authority": "EPSG",
  "version": "10.095(13.3.0)",
  "deprecated": "no",
  "areaname": "Europe - Brenner",
  "extent": {
    "slat": 46.45,
    "nlat": 47.33,
    "llon": 11.04,
    "rlon": 11.91
  }
}