Details - HeadDB

Warning: The UUIDs are not real.

Command

/give @p skull 1 3 {display:{Name:"R",Lore:["Skull from HeadDB.org"]},SkullOwner:{Id:"69475423-6d23-38ea-8ba4-a3376e05d0de",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYTVjZWQ5OTMxYWNlMjNhZmMzNTEzNzEzNzliZjA1YzYzNWFkMTg2OTQzYmMxMzY0NzRlNGU1MTU2YzRjMzcifX19"}]}}}

API Usage

GET https://headdb.org/api/head/69475423-6d23-38ea-8ba4-a3376e05d0de

{
  "name": "R",
  "uuid": "69475423-6d23-38ea-8ba4-a3376e05d0de",
  "value": "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYTVjZWQ5OTMxYWNlMjNhZmMzNTEzNzEzNzliZjA1YzYzNWFkMTg2OTQzYmMxMzY0NzRlNGU1MTU2YzRjMzcifX19",
  "valueDecoded": {
    "textures": {
      "SKIN": {
        "url": "http://textures.minecraft.net/texture/a5ced9931ace23afc351371379bf05c635ad186943bc136474e4e5156c4c37"
      }
    }
  },
  "command": "/give @p skull 1 3 {display:{Name:\"R\",Lore:[\"Skull from HeadDB.org\"]},SkullOwner:{Id:\"69475423-6d23-38ea-8ba4-a3376e05d0de\",Properties:{textures:[{Value:\"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYTVjZWQ5OTMxYWNlMjNhZmMzNTEzNzEzNzliZjA1YzYzNWFkMTg2OTQzYmMxMzY0NzRlNGU1MTU2YzRjMzcifX19\"}]}}}"
}

Minecraft Head Database

GET https://headdb.org/api/head/69475423-6d23-38ea-8ba4-a3376e05d0de