Add licensing information.

blank-canvas-blocks/style.css

@@ -12,4 +12,57 @@ License: GNU General Public License v2 or later
 License URI: LICENSE
 Text Domain: blank-canvas-blocks 
 Tags: one-column, editor-style, featured-images 
+
+Blank Canvas Blocks WordPress Theme, (C) 2021 Automattic, Inc.
+Blank Canvas Blocks is distributed under the terms of the GNU GPL.
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+Images from stocksnap.io
+License: CC0
+- Sarah Pflug: https://stocksnap.io/photo/hand-sign-BPQSX1BQTF
+- Clem Onojeghuo: https://stocksnap.io/photo/beanie-scarf-M2U9VL0ZWG
+- Brooke Cagle: https://stocksnap.io/photo/people-woman-MU7G67710S
+- Daria Shevtsova: https://stocksnap.io/photo/girl-camera-AZED07HITL
+- Benjamin Voros: https://stocksnap.io/photo/blue-denim-BWPRK5DEF0
+- Artsy Crafty: https://stocksnap.io/photo/office-supplies-BDVUKQ4BBF
+- Artsy Crafty: https://stocksnap.io/photo/colorful-pencils-NONEDF6REB
+- Austin Neill: https://stocksnap.io/photo/concert-singer-F66MXRQS1K
+- Bruce Mars: https://stocksnap.io/photo/woman-sunglasses-MO7PZ7AYIC
+- Foodie Girl: https://stocksnap.io/photo/nature-food-AUVLL0XR1V
+Used as block pattern images.
+
+Image from foodiesfeed.com
+License: CC0
+https://www.foodiesfeed.com/free-food-photo/watermelon-juice-2/
+Used as block pattern image.
+
+Hamburger Icon from Noto Emoji
+License: Apache License 2.0
+https://github.com/googlefonts/noto-emoji/blob/master/svg/emoji_u1f354.svg
+Modified and used as a block pattern image.
+
+Bullhorn Icon by the Consumer Financial Protection Bureau, US
+License: Public Domain
+https://thenounproject.com/term/bullhorn/89665/
+Modified and used as a block pattern image.
+
+Self-Portrait with Two Pupils, Marie Gabrielle Capet and Marie Marguerite Carreaux de Rosemond
+by Adélaïde Labille-Guiard, 1785
+License: Public Domain
+https://www.metmuseum.org/art/collection/search/436840
+Used as a block pattern image.
+
+Gradient Video
+License: CC0
+Designed by Ballio Chan for the Blank Canvas theme.
+Used as block pattern background.
 */