diff --git a/src/app/api/registry/route.ts b/src/app/api/registry/route.ts
index fe3abe7..174992a 100644
--- a/src/app/api/registry/route.ts
+++ b/src/app/api/registry/route.ts
@@ -25,6 +25,7 @@ const ALLOWED_SLIPPAGE_FACTOR = 0.2
 
 // Use CAIP convention for chain ID: namespace + reference
 const SOLANA_CHAIN_ID = 'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp'; // Solana mainnet
+const GORBAGANA_CHAIN_ID = 'gorbagana:533uBE9RRquhTBqEX58oV52FdTTsReMd' // Gorbagana chain (first 32 characters of gorbagana genesis hash. Following solana CAIP chain ID pattern)
 
 // Sleep helper function
 const sleep = (ms: number) => new Promise(resolve => setTimeout(resolve, ms));
@@ -464,7 +465,7 @@ export async function POST(request: NextRequest) {
         repository_ref: fullHash,
       },
       external_payment: {
-        chain_id: SOLANA_CHAIN_ID,
+        chain_id: paymentMethod === PaymentMethod.SPL_TOKEN ? SOLANA_CHAIN_ID : GORBAGANA_CHAIN_ID,
         tx_hash: txHash,
         pubkey: senderPublicKey
       },