License header for CSS/JS resources

Question

I'm creating a template for a company and fetching all vendor libs and selfmade code together to one minified style.css and script.js.

My question to you is: Is this following license header legal?

/*!
 * FooBar Company Template (https://foobar-company.xyz)
 * Copyright 2016 FooBoar Company
 * Unauthorized copying of this template, via any medium is strictly prohibited.
 *
 * Vendor resources
 *
 *  Font Awesome 4.6.3 by @davegandy - http://fontawesome.io - @fontawesome
 *  License - http://fontawesome.io/license (Font: SIL OFL 1.1, CSS: MIT License)
 *
 *  Open Sans by Steve Matteson
 *  Licensed under Apache License 2.0
 *
 *  Bootstrap v3.3.7 (http://getbootstrap.com)
 *  Copyright 2011-2015 Twitter, Inc.
 *  Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 *
 */
[here follows minified CSS stuff]

The license header for my minified JS file looks similiar.

After reading your response my final source header looks like this

/****************************************************************************
 * FooBar Company Template v1.0.0
 * Copyright 2016 | FooBar | https://foobar.xyz
 *
 * This template integrates components from the following projects
 *
 *  Font Awesome 4.7.0 by @davegandy | fontawesome.io/license (Font: SIL OFL 1.1, CSS: MIT License)
 *  Open Sans by Steve Matteson | Apache License 2.0
 *  jQuery v3.1.1 | (c) jQuery Foundation | jquery.org/license
 *  Bootstrap v3.3.7 | Copyright 2011-2016 Twitter, Inc. | MIT License
 *  Bootstrap Modalizer v1.0.0 | (c) 2016 Jonathan Nessier, Neoflow | MIT License
 *  Menu Icon v1.0 | (c) Neoflow | MIT License
 *  Hammer.JS v2.0.8 | Copyright (c) 2016 Jorik Tangelder | MIT License
 *
 ****************************************************************************/

Answer 1

Is this following license header legal?

I cannot say if this is legal, but it sure does not look complete or correct.

Some licenses may have specific requirements that I would not properly meet unless I included the full text of the license, for instance for the MIT:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

Some licenses may NOT be sub-licensable (as is the MIT) for instance the SIL OFL 1.1 and this may conflict with a proprietary notice that would essentially re/sub-license the code under another license.

5) The Font Software, modified or unmodified, in part or in whole, must be distributed entirely under this license, and must not be distributed under any other license. The requirement for fonts to remain under this license does not apply to any document created using the Font Software.

Additional answer elements:

After reading your response my final source header looks like this

/****************************************************************************
 * FooBar Company Template v1.0.0
 * Copyright 2016 | FooBar | https://foobar.xyz
 *
 * This template integrates components from the following projects
 *
 *  Font Awesome 4.7.0 by @davegandy | fontawesome.io/license (Font: SIL OFL 1.1, CSS: MIT License)
 *  Open Sans by Steve Matteson | Apache License 2.0
 *  jQuery v3.1.1 | (c) jQuery Foundation | jquery.org/license
 *  Bootstrap v3.3.7 | Copyright 2011-2016 Twitter, Inc. | MIT License
 *  Bootstrap Modalizer v1.0.0 | (c) 2016 Jonathan Nessier, Neoflow | MIT License
 *  Menu Icon v1.0 | (c) Jonathan Nessier, Neoflow | MIT License
 *  Hammer.JS v2.0.8 | Copyright (c) 2016 Jorik Tangelder | MIT License
 *
 ****************************************************************************/

This looks fine to me with some caveats: the licenses texts would need to be included somehow if not in the code itself, at least side-by-side with your code and accessible from that code , e.g. possibly linked. The Apache-licensed packages may also have specific NOTICEs that may need to be reproduced too.