Do you have autorecovery enabled? In that case a recovered version should open automatically the next time you launch Photoshop. Note, and this is important: For autorecovery to initiate, the file has to be saved to disk at least once.
The way it works is that Photoshop will save at given intervals to a temp folder on disk. In a normal shutdown, the content of this folder is just deleted. If, however, the computer crashes, there is no normal shutdown sequence, and so the folder is not emptied.
When Photoshop starts up, it looks in this folder. If there is something there, it's opened. If nothing opens, there's nothing there.
Content Credentials is just a way to tag AI-generated content so that it can always be traced and never be passed off as an un-manipulated image. This is automatic and tamper-proof.
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