rpcserver: expand VerifyAssetOwnership

This commit expands VerifyAssetownership by returning the outpoint
block hash and blockheight of the proof.

rpcserver.go

@@ -5921,7 +5921,7 @@ func (r *rpcServer) VerifyAssetOwnership(ctx context.Context,
 
 	headerVerifier := tapgarden.GenHeaderVerifier(ctx, r.cfg.ChainBridge)
 	groupVerifier := tapgarden.GenGroupVerifier(ctx, r.cfg.MintingStore)
-	_, err = p.Verify(
+	snapShot, err := p.Verify(
 		ctx, nil, headerVerifier, proof.DefaultMerkleVerifier,
 		groupVerifier, lookup,
 	)
@@ -5931,6 +5931,12 @@ func (r *rpcServer) VerifyAssetOwnership(ctx context.Context,
 
 	return &wrpc.VerifyAssetOwnershipResponse{
 		ValidProof: true,
+		Outpoint: &taprpc.OutPoint{
+			Txid:        snapShot.OutPoint.Hash[:],
+			OutputIndex: snapShot.OutPoint.Index,
+		},
+		BlockHash:   snapShot.AnchorBlockHash[:],
+		BlockHeight: snapShot.AnchorBlockHeight,
 	}, nil
 }