Proza Libre / 400
{
  "copyright": {
    "en": "Copyright (c) 2015 by Jasper de Waard. All rights reserved."
  },
  "license": {
    "en": "SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007"
  },
  "licenseURL": {
    "en": "http://scripts.sil.org/OFL"
  }
}

Proza Libre / 600
{
  "copyright": {
    "en": "Copyright (c) 2015 by Jasper de Waard. All rights reserved."
  },
  "license": {
    "en": "SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007"
  },
  "licenseURL": {
    "en": "http://scripts.sil.org/OFL"
  }
}

Proza Libre / 700
{
  "copyright": {
    "en": "Copyright (c) 2015 by Jasper de Waard. All rights reserved."
  },
  "license": {
    "en": "SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007"
  },
  "licenseURL": {
    "en": "http://scripts.sil.org/OFL"
  }
}