DOItoISSN.py

import urllib.request
import json

url = 'https://doi.org/10.1038/s41586-019-1863-2'
headers = {'Accept': 'application/citeproc+json'}
req = urllib.request.Request(url, {}, headers)
with urllib.request.urlopen(req) as response:
   doi_metadata = response.read()
   doi_json = json.loads(doi_metadata)
   print(doi_json["ISSN"])

Example use and output:

Toms-MacBook-Pro-4:Desktop tom$ python3 DOItoISSN.py
['0028-0836', '1476-4687']

Note that not all DOIs have an ISSN, as not everything is published in a journal!

To get ISSNs for an ORCID account

1. Read their list of works
2. For each work that does not have an ISSN, but does have a DOI use the DOI API to discover the ISSN. This will work for Crossref, Datacite, Medra, KISTI DOIs.