Re:Son: A minimal subset of JSON for machine-to-machine comm...
by heavenlyhash on Saturday December 23, 2017 @02:25PM
(#15995771)
You might be interested in IPLD in particular: https://ipld.io/
They use CBOR as the underlying serialization, and have a deep interest in canonicalization and applications of hashing.
EDIT: I am happy to see that it handles date-time. Not really my favorite part of the non-spec of JSON on that front...