How can I register multiple global shortcuts in Electron?

I’m building a prototype on top of
I have the following code in main.js and nothing else in other files:

const electron = require('electron')
// Module to control application life.
const app =
// Module to create native browser window.
const BrowserWindow = electron.BrowserWindow

const path = require('path')
const url = require('url')
const globalShortcut = electron.globalShortcut
const {clipboard} = require('electron')

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow

function createWindow () {
  // Create the browser window.
  mainWindow = new BrowserWindow({width: 800, height: 600})

  // and load the index.html of the app.
    pathname: path.join(__dirname, 'index.html'),
    protocol: 'file:',
    slashes: true

  // Open the DevTools.
  // mainWindow.webContents.openDevTools()

  // Emitted when the window is closed.
  mainWindow.on('closed', function () {
    // Dereference the window object, usually you would store windows
    // in an array if your app supports multi windows, this is the time
    // when you should delete the corresponding element.
    mainWindow = null

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', function() {
  globalShortcut.register('Alt+h', () => {
    let date = new Date();

  globalShortcut.register('Alt+c', function() {
    clipboard.writeText('Multitabler spin 2 tables');

// Quit when all windows are closed.
app.on('window-all-closed', function () {
  // On OS X it is common for applications and their menu bar
  // to stay active until the user quits explicitly with Cmd + Q
  if (process.platform !== 'darwin') {

app.on('activate', function () {
  // On OS X it's common to re-create a window in the app when the
  // dock icon is clicked and there are no other windows open.
  if (mainWindow === null) {

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.

On the ‘ready’ event, I register two shortcuts: Alt+h and Alt+c. Alt+h works in the sense that the date is copied to my clipboard but the other shortcut doesn’t produce any output to the clipboard.
What have I tried: I tried to replace the clipboard write event in the second shortcut with a console.log statement. I got no output when I pressed that key combination.
How can I register multiple global short-codes that activate regardless if the app is focused or minimized.