Hi,
I made a tool to import isrc’s from spotify, inspired by the d.ontun.es tool:
Fill in the spotify url or id of the release you want to get the isrc’s from. It will fetch the MusicBrainz release that has this spotify release as resource.
You can then compare the tracks and if all is correct, add them to MB.
Please use with care and if you see something wrong, let me know.
Thanks!