diff --git a/x/supplier/keeper/proof.go b/x/supplier/keeper/proof.go
index 0dbff0855..aec052d5b 100644
--- a/x/supplier/keeper/proof.go
+++ b/x/supplier/keeper/proof.go
@@ -11,6 +11,7 @@ import (
 func (k Keeper) UpsertProof(ctx sdk.Context, proof types.Proof) {
 	store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefix(types.ProofKeyPrefix))
 	b := k.cdc.MustMarshal(&proof)
+	// TODO_NEXT(@bryanchriswhite #141): Refactor keys to support multiple indices.
 	store.Set(types.ProofKey(
 		proof.GetSessionHeader().GetSessionId(),
 	), b)
@@ -24,6 +25,7 @@ func (k Keeper) GetProof(
 ) (val types.Proof, found bool) {
 	store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefix(types.ProofKeyPrefix))
 
+	// TODO_NEXT(@bryanchriswhite #141): Refactor proof keys to support multiple indices.
 	b := store.Get(types.ProofKey(
 		sessionId,
 	))
@@ -38,10 +40,12 @@ func (k Keeper) GetProof(
 // RemoveProof removes a proof from the store
 func (k Keeper) RemoveProof(
 	ctx sdk.Context,
+	// TODO_NEXT(@bryanchriswhite #141): Refactor proof keys to support multiple indices.
 	index string,
 
 ) {
 	store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefix(types.ProofKeyPrefix))
+	// TODO_NEXT(@bryanchriswhite #141): Refactor proof keys to support multiple indices.
 	store.Delete(types.ProofKey(
 		index,
 	))