This is now the thread linked to by the (?) from our copyright datails tags

All content in this thread is written with the best knowledge I have, but I am not a legal expert and if in doubt you should check further. 
There is further background and an FAQ at https://www.firstgreatwestern.info/coffeeshop/index.php?topic=31403.0

For members posting

You are responsible for what you post.  The Coffee Shop software provides an element of assistance in that it will only public share images "hotlinked" from external sites if you add a tag indicating the copyright status of them.  If no such tag is supplied, guests viewing the posts will see a redaction message.

For all readers

We have provided a number of options that you may use to declare copyright status. And this thread describes what they mean. It's here both to give you the choice of what to say if you're posting, and to inform you if you're reading this message.

[CC] to state Image is shared Creative Commons (by poster) (?)
This says that the images may be/are shared, with credit and under the same license.  ("Share and share alike").  There's a variety of Creative Commons licenses - see https://www.wellho.info/pix for the one I chose to use.

[CR] to state Image copyright Reserved (by poster) (?)
This says that the poster has put the image here, but does not license them for any further use / sharing.  "If you want to re-use, please ask me"

[CD] to state Image cleared for poster's use here (?)
This says that the image is not the poster's but (s)he has permission to use it here. You need to check with the image's copyright holder for futher advise.

[PD] to state Image is in Public Domain (?)
This image is believed to be in the public domain and can be shared even without any attribution. Usually applies to old stuff but is complex
see https://lawdit.co.uk/readingroom/whose-copyright-is-expiring-this-year

[FU] to state Images in this post are reproduced here under a fair use exception (?)
Limited quoting in allowed for critical review, education, news reporting and a couple of other reasons, and this content is allowd here because of that. There is a good description at https://www.briffa.com/blog/understanding-copyright-and-fair-use/

[CO] to state Image has other copyright (?)
Something different to any of the above - if posting, please add an explanation.

[CN] No statement is made
but the image is never the less public visible

[CS] to state Image is shared Creative Commons (by Coffee Shop) (?)
This is the one I use. see https://www.wellho.info/pix. That should be used where you quote an image from my library in public

[AR]  to state All rights reserved © (?)
Copyright applies to much more than images - it also applies to prose, poetry, editorial content, and much more. Members posting are reminded that they should take especial care in public posts when adding longer quotes.  If you want an explicit general copright notice on your post you may add