Get resources

wget https://api.unfoldingword.org/obs/txt/1/uW-test-vk.pem
wget https://api.unfoldingword.org/obs/txt/1/en/obs-en.sig
wget https://api.unfoldingword.org/obs/txt/1/en/obs-en.json

Verify

[jesse@jesse crypt]$ python
Python 2.7.5 (default, Nov  3 2014, 14:26:24) 
[GCC 4.8.3 20140911 (Red Hat 4.8.3-7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from ecdsa import VerifyingKey, BadSignatureError
>>> vk = VerifyingKey.from_pem(open("uW-test-vk.pem").read())
>>> message = open("obs-en.json","rb").read()
>>> sig = open("obs-en.sig","rb").read()
>>> try:
...   vk.verify(sig, message)
...   print "good signature"
... except BadSignatureError:
...   print "BAD SIGNATURE"
... 
True
good signature