What I wrote is based on a witness page by his sister-in-law
https://yvng.yadvashem.org/nameDetails.html?language=he&itemId=...
I think there was also another source, but I'll have to go over my notes to figure what it was.
There was also another witness page by his brother-in-law
https://yvng.yadvashem.org/nameDetails.html?language=he&itemId=...
I noticed that there is indeed another Akiva Goldhaber from Czortkow-
https://yvng.yadvashem.org/nameDetails.html?language=he&itemId=...
Maybe they were cousins