On Oct 9, 2017, micky wrote
(in ):

How do you post things to Instagram, Imgur, or Flickr without losing
one's copyright?

I seriously doubt that you will have much protection if you use Instagram, or
Imgur regardless of what might be stated in their terms of service. Using
ether of those and you are effectively surrendering any rights you might
hold.

https://help.instagram.com/478745558852511

https://imgur.com/tos

Flickr, and other sites such as Smugmug probably afford you better protection
of your rights, but that does not mean that they will not be vulnerable to
image poachers.

https://www.flickr.com/services/api/tos/

I would use Flickr, or Smugmug exclusively.
Remember that you have added an additional level of intellectual rights by
making digital scans of analog images in which you have inherited rights.


I don't know that anything I have is worth anything financially but I do
want the credit. My name or my father's name accompanying every
properly used use of the photo.

My suggestion is to add a Creative Commons License, with you as the copyright
holder to the metadata of the scanned image files. I use a CC by-nc-sa for my
photos especially if I have shared them online. There are different types of
free CC licenses. You can find out more he
https://creativecommons.org/licenses/by-nc-nd/4.0/
https://creativecommons.org/faq/


Right now, two things are on the horizon. I'm transcribing my father's
trip diary from a trip he took in 1936, and I'm scanning the photos he
took on the trip.

I'm his only surviving heir. And my mother left everything he left her
to me. Does that mean I myself have any rights regarding these things?

Yes, and your scanning of the images enhances their value, and extends your
rights with regard to those specific images.

Even if I have no rights to the pictures, since no one can get into my
house and copy them, I have the vague idea that I'd have rights to the
scanned copy I plan to make of them, for posting online, and that those
rights would last as long and be as strong as if I'd taken the pictures
myself. Am I right at all?

Yes.

And how do I post these pictures and the separate text to Instagram,
Imgur, or Flickr without losing my copyrights?

Instagram, and Imgur will do nothing to protect your rights, in fact you are
granting them a perpetual license to use your images as the see fit. Flickr
will lay no claim on your images and you will always retain full ownership.

Thanks

--

Regards,
Savageduck