diff --git a/src/pubkey.cpp b/src/pubkey.cpp
index 75202e7cf41..100b3156158 100644
--- a/src/pubkey.cpp
+++ b/src/pubkey.cpp
@@ -180,6 +180,23 @@ XOnlyPubKey::XOnlyPubKey(Span<const unsigned char> bytes)
     std::copy(bytes.begin(), bytes.end(), m_keydata.begin());
 }
 
+std::vector<CKeyID> XOnlyPubKey::GetKeyIDs() const
+{
+    std::vector<CKeyID> out;
+    // For now, use the old full pubkey-based key derivation logic. As it is indexed by
+    // Hash160(full pubkey), we need to return both a version prefixed with 0x02, and one
+    // with 0x03.
+    unsigned char b[33] = {0x02};
+    std::copy(m_keydata.begin(), m_keydata.end(), b + 1);
+    CPubKey fullpubkey;
+    fullpubkey.Set(b, b + 33);
+    out.push_back(fullpubkey.GetID());
+    b[0] = 0x03;
+    fullpubkey.Set(b, b + 33);
+    out.push_back(fullpubkey.GetID());
+    return out;
+}
+
 bool XOnlyPubKey::IsFullyValid() const
 {
     secp256k1_xonly_pubkey pubkey;
diff --git a/src/pubkey.h b/src/pubkey.h
index eec34a89c2a..861a2cf5006 100644
--- a/src/pubkey.h
+++ b/src/pubkey.h
@@ -267,6 +267,11 @@ public:
     /** Construct a Taproot tweaked output point with this point as internal key. */
     std::optional<std::pair<XOnlyPubKey, bool>> CreateTapTweak(const uint256* merkle_root) const;
 
+    /** Returns a list of CKeyIDs for the CPubKeys that could have been used to create this XOnlyPubKey.
+     * This is needed for key lookups since keys are indexed by CKeyID.
+     */
+    std::vector<CKeyID> GetKeyIDs() const;
+
     const unsigned char& operator[](int pos) const { return *(m_keydata.begin() + pos); }
     const unsigned char* data() const { return m_keydata.begin(); }
     static constexpr size_t size() { return decltype(m_keydata)::size(); }
diff --git a/src/script/descriptor.cpp b/src/script/descriptor.cpp
index 682b55742a5..621a1b9fd6a 100644
--- a/src/script/descriptor.cpp
+++ b/src/script/descriptor.cpp
@@ -1242,14 +1242,8 @@ std::unique_ptr<PubkeyProvider> InferXOnlyPubkey(const XOnlyPubKey& xkey, ParseS
     CPubKey pubkey(full_key);
     std::unique_ptr<PubkeyProvider> key_provider = std::make_unique<ConstPubkeyProvider>(0, pubkey, true);
     KeyOriginInfo info;
-    if (provider.GetKeyOrigin(pubkey.GetID(), info)) {
+    if (provider.GetKeyOriginByXOnly(xkey, info)) {
         return std::make_unique<OriginPubkeyProvider>(0, std::move(info), std::move(key_provider));
-    } else {
-        full_key[0] = 0x03;
-        pubkey = CPubKey(full_key);
-        if (provider.GetKeyOrigin(pubkey.GetID(), info)) {
-            return std::make_unique<OriginPubkeyProvider>(0, std::move(info), std::move(key_provider));
-        }
     }
     return key_provider;
 }
diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index 4714d0ef11c..b912b00365b 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -60,22 +60,7 @@ bool MutableTransactionSignatureCreator::CreateSchnorrSig(const SigningProvider&
     assert(sigversion == SigVersion::TAPROOT || sigversion == SigVersion::TAPSCRIPT);
 
     CKey key;
-    {
-        // For now, use the old full pubkey-based key derivation logic. As it is indexed by
-        // Hash160(full pubkey), we need to try both a version prefixed with 0x02, and one
-        // with 0x03.
-        unsigned char b[33] = {0x02};
-        std::copy(pubkey.begin(), pubkey.end(), b + 1);
-        CPubKey fullpubkey;
-        fullpubkey.Set(b, b + 33);
-        CKeyID keyid = fullpubkey.GetID();
-        if (!provider.GetKey(keyid, key)) {
-            b[0] = 0x03;
-            fullpubkey.Set(b, b + 33);
-            CKeyID keyid = fullpubkey.GetID();
-            if (!provider.GetKey(keyid, key)) return false;
-        }
-    }
+    if (!provider.GetKeyByXOnly(pubkey, key)) return false;
 
     // BIP341/BIP342 signing needs lots of precomputed transaction data. While some
     // (non-SIGHASH_DEFAULT) sighash modes exist that can work with just some subset
diff --git a/src/script/signingprovider.h b/src/script/signingprovider.h
index 939ae106226..fbce61c6a96 100644
--- a/src/script/signingprovider.h
+++ b/src/script/signingprovider.h
@@ -26,6 +26,30 @@ public:
     virtual bool HaveKey(const CKeyID &address) const { return false; }
     virtual bool GetKeyOrigin(const CKeyID& keyid, KeyOriginInfo& info) const { return false; }
     virtual bool GetTaprootSpendData(const XOnlyPubKey& output_key, TaprootSpendData& spenddata) const { return false; }
+
+    bool GetKeyByXOnly(const XOnlyPubKey& pubkey, CKey& key) const
+    {
+        for (const auto& id : pubkey.GetKeyIDs()) {
+            if (GetKey(id, key)) return true;
+        }
+        return false;
+    }
+
+    bool GetPubKeyByXOnly(const XOnlyPubKey& pubkey, CPubKey& out) const
+    {
+        for (const auto& id : pubkey.GetKeyIDs()) {
+            if (GetPubKey(id, out)) return true;
+        }
+        return false;
+    }
+
+    bool GetKeyOriginByXOnly(const XOnlyPubKey& pubkey, KeyOriginInfo& info) const
+    {
+        for (const auto& id : pubkey.GetKeyIDs()) {
+            if (GetKeyOrigin(id, info)) return true;
+        }
+        return false;
+    }
 };
 
 extern const SigningProvider& DUMMY_SIGNING_PROVIDER;