diff --git a/README.md b/README.md
index ec07ee6..d486336 100644
--- a/README.md
+++ b/README.md
@@ -74,6 +74,9 @@ Attesto stores source-system time separately from backend ingest time.
 `time.Now().UTC()` when omitted, but production integrations should pass the
 real upstream event timestamp whenever the source system provides one.
 
+
+Canonicalization is specified normatively in [ATTESTO-CANONICAL-JSON-001](../../docs/protocol/ATTESTO-CANONICAL-JSON-001.md); the parity corpus `golden-vectors/sdk-parity/` is its conformance set.
+
 ## Committed payload number rule
 
 When events are committed to a Proofstream, payload and metadata numbers must