diff --git a/tree/arbo/proof.go b/tree/arbo/proof.go
index 5fc3d116c..577fb4034 100644
--- a/tree/arbo/proof.go
+++ b/tree/arbo/proof.go
@@ -231,6 +231,7 @@ func CheckProofBatch(hashFunc HashFunction, oldProofs, newProofs []*CircomVerifi
 
 		for level, hash := range nodes {
 			newBranches[hex.EncodeToString(hash)] = level
+			fmt.Printf("newBranch(%d): %x\n", level, hash) // debug
 		}
 
 		for level := range newProofs[i].Siblings {
@@ -240,6 +241,8 @@ func CheckProofBatch(hashFunc HashFunction, oldProofs, newProofs []*CircomVerifi
 			}
 		}
 	}
+	fmt.Println("\n\ni derived all these hashes from the proofs\n", newBranches) // debug
+	fmt.Println("the proofs had these new siblings\n", newSiblings)              // debug
 
 	for hash, level := range newSiblings {
 		if newBranches[hash] != newSiblings[hash] {