Where I can find a good sample of envato split license sample?

Hello, Can someone provide me a envato split license sample? Actually we are working on a script and approved by envato. But problem is we did not include any license with it. But users asking for license type for it. We tried looking into envato but see no license sample for it aside GPL license which gets included by default. In our script we used some open source assets but php codes written for system development is soley by us. Is there any way we can have it copyrighted? Looking forward to your help please how do we set this up?

Hi

All item in envato market copyrighted by items Authors. When your customer purchased any of your item mean they have bought a license of the item to use for their end product. Envato purchase code is the key of License. So for getting the license key Customer should to collect their purchase code

Thanks