diff --git a/ethcore/res/ethereum/mcip6_byz.json b/ethcore/res/ethereum/mcip6_byz.json
new file mode 100644
index 000000000..da40d6882
--- /dev/null
+++ b/ethcore/res/ethereum/mcip6_byz.json
@@ -0,0 +1,160 @@
+{
+  "name":"Musicoin Byzantium Test",
+  "dataDir":"mcip6test",
+  "engine":{
+    "Ethash":{
+      "params":{
+        "minimumDifficulty":"0x020000",
+        "difficultyBoundDivisor":"0x0800",
+        "durationLimit":"0x0d",
+        "homesteadTransition":"0x17",
+        "eip100bTransition":"0x2a",
+        "eip150Transition":"0x2a",
+        "eip160Transition":"0x7fffffffffffff",
+        "eip161abcTransition":"0x7fffffffffffff",
+        "eip161dTransition":"0x7fffffffffffff",
+        "eip649Transition":"0x2a",
+        "blockReward":"0x1105a0185b50a80000",
+        "mcip3Transition":"0x17",
+        "mcip3MinerReward":"0xd8d726b7177a80000",
+        "mcip3UbiReward":"0x2b5e3af16b1880000",
+        "mcip3UbiContract":"0x00efdd5883ec628983e9063c7d969fe268bbf310",
+        "mcip3DevReward":"0xc249fdd327780000",
+        "mcip3DevContract":"0x00756cf8159095948496617f5fb17ed95059f536"
+      }
+    }
+  },
+  "params":{
+    "gasLimitBoundDivisor":"0x0400",
+    "registrar":"0x5C271c4C9A67E7D73b7b3669d47504741354f21D",
+    "accountStartNonce":"0x00",
+    "maximumExtraDataSize":"0x20",
+    "minGasLimit":"0x1388",
+    "networkID":"0x76740c",
+    "forkBlock":"0x2b",
+    "forkCanonHash":"0x23c3171e864a5d513a3ef85e4cf86dac4cc36b89e5b8e63bf0ebcca68b9e43c9",
+    "eip86Transition":"0x7fffffffffffff",
+    "eip98Transition":"0x7fffffffffffff",
+    "eip140Transition":"0x2a",
+    "eip155Transition":"0x2a",
+    "eip211Transition":"0x2a",
+    "eip214Transition":"0x2a",
+    "eip658Transition":"0x2a",
+    "maxCodeSize":"0x6000"
+  },
+  "genesis":{
+    "seal":{
+      "ethereum":{
+        "nonce":"0x000000000000002a",
+        "mixHash":"0x00000000000000000000000000000000000000647572616c65787365646c6578"
+      }
+    },
+    "difficulty":"0x3d0900",
+    "author":"0x0000000000000000000000000000000000000000",
+    "timestamp":"0x00",
+    "parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000",
+    "extraData":"",
+    "gasLimit":"0x7a1200"
+  },
+  "nodes":[
+    "enode://5ddc110733f6d34101973cdef3f9b43484159acf6f816d3b1ee92bc3c98ea453e857bb1207edf0ec0242008ab3a0f9f05eeaee99d47bd414c08a5bdf4847de13@176.9.3.148:30303",
+		"enode://38f074f4db8e64dfbaf87984bf290eef67772a901a7113d1b62f36216be152b8450c393d6fc562a5e38f04f99bc8f439a99010a230b1d92dc1df43bf0bd00615@176.9.3.148:30403"
+  ],
+  "accounts":{
+    "0000000000000000000000000000000000000001":{
+      "balance":"1",
+      "builtin":{
+        "name":"ecrecover",
+        "pricing":{
+          "linear":{
+            "base":3000,
+            "word":0
+          }
+        }
+      }
+    },
+    "0000000000000000000000000000000000000002":{
+      "balance":"1",
+      "builtin":{
+        "name":"sha256",
+        "pricing":{
+          "linear":{
+            "base":60,
+            "word":12
+          }
+        }
+      }
+    },
+    "0000000000000000000000000000000000000003":{
+      "balance":"1",
+      "builtin":{
+        "name":"ripemd160",
+        "pricing":{
+          "linear":{
+            "base":600,
+            "word":120
+          }
+        }
+      }
+    },
+    "0000000000000000000000000000000000000004":{
+      "balance":"1",
+      "builtin":{
+        "name":"identity",
+        "pricing":{
+          "linear":{
+            "base":15,
+            "word":3
+          }
+        }
+      }
+    },
+    "0000000000000000000000000000000000000005":{
+      "builtin":{
+        "name":"modexp",
+        "activate_at":"0x2a",
+        "pricing":{
+          "modexp":{
+            "divisor":20
+          }
+        }
+      }
+    },
+    "0000000000000000000000000000000000000006":{
+      "builtin":{
+        "name":"alt_bn128_add",
+        "activate_at":"0x2a",
+        "pricing":{
+          "linear":{
+            "base":500,
+            "word":0
+          }
+        }
+      }
+    },
+    "0000000000000000000000000000000000000007":{
+      "builtin":{
+        "name":"alt_bn128_mul",
+        "activate_at":"0x2a",
+        "pricing":{
+          "linear":{
+            "base":40000,
+            "word":0
+          }
+        }
+      }
+    },
+    "0000000000000000000000000000000000000008":{
+      "builtin":{
+        "name":"alt_bn128_pairing",
+        "activate_at":"0x2a",
+        "pricing":{
+          "alt_bn128_pairing":{
+            "base":100000,
+            "pair":80000
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/ethcore/res/ethereum/musicoin.json b/ethcore/res/ethereum/musicoin.json
index cf4d4ffba..2dcdb6d8f 100644
--- a/ethcore/res/ethereum/musicoin.json
+++ b/ethcore/res/ethereum/musicoin.json
@@ -8,12 +8,12 @@
         "difficultyBoundDivisor":"0x0800",
         "durationLimit":"0x0d",
         "homesteadTransition":"0x118c30",
-        "eip100bTransition":"0x7fffffffffffff",
-        "eip150Transition":"0x7fffffffffffff",
+        "eip100bTransition":"0x21e88e",
+        "eip150Transition":"0x21e88e",
         "eip160Transition":"0x7fffffffffffff",
         "eip161abcTransition":"0x7fffffffffffff",
         "eip161dTransition":"0x7fffffffffffff",
-        "eip649Transition":"0x7fffffffffffff",
+        "eip649Transition":"0x21e88e",
         "blockReward":"0x1105a0185b50a80000",
         "mcip3Transition":"0x124f81",
         "mcip3MinerReward":"0xd8d726b7177a80000",
@@ -31,15 +31,15 @@
     "maximumExtraDataSize":"0x20",
     "minGasLimit":"0x1388",
     "networkID":"0x76740f",
-    "forkBlock":"0x5b6",
-    "forkCanonHash":"0xa5e88ad9e34d113e264e307bc27e8471452c8fc13780324bb3abb96fd0558343",
+    "forkBlock":"0x1d8015",
+    "forkCanonHash":"0x380602acf82b629a0be6b5adb2b4a801e960a07dc8261bf196d21befdbb8f2f9",
     "eip86Transition":"0x7fffffffffffff",
     "eip98Transition":"0x7fffffffffffff",
-    "eip140Transition":"0x7fffffffffffff",
-    "eip155Transition":"0x7fffffffffffff",
-    "eip211Transition":"0x7fffffffffffff",
-    "eip214Transition":"0x7fffffffffffff",
-    "eip658Transition":"0x7fffffffffffff",
+    "eip140Transition":"0x21e88e",
+    "eip155Transition":"0x21e88e",
+    "eip211Transition":"0x21e88e",
+    "eip214Transition":"0x21e88e",
+    "eip658Transition":"0x21e88e",
     "maxCodeSize":"0x6000"
   },
   "genesis":{
@@ -57,12 +57,9 @@
     "gasLimit":"0x7a1200"
   },
   "nodes":[
-    "enode://a979fb575495b8d6db44f750317d0f4622bf4c2aa3365d6af7c284339968eef29b69ad0dce72a4d8db5ebb4968de0e3bec910127f134779fbcb0cb6d3331163c@52.16.188.185:30303",
-    "enode://3f1d12044546b76342d59d4a05532c14b85aa669704bfe1f864fe079415aa2c02d743e03218e57a33fb94523adb54032871a6c51b2cc5514cb7c7e35b3ed0a99@13.93.211.84:30303",
-    "enode://78de8a0916848093c73790ead81d1928bec737d565119932b98c6b100d944b7a95e94f847f689fc723399d2e31129d182f7ef3863f2b4c820abbf3ab2722344d@191.235.84.50:30303",
-    "enode://158f8aab45f6d19c6cbf4a089c2670541a8da11978a2f90dbf6a502a4a3bab80d288afdbeb7ec0ef6d92de563767f3b1ea9e8e334ca711e9f8e2df5a0385e8e6@13.75.154.138:30303",
-    "enode://1118980bf48b0a3640bdba04e0fe78b1add18e1cd99bf22d53daac1fd9972ad650df52176e7c7d89d1114cfef2bc23a2959aa54998a46afcf7d91809f0855082@52.74.57.123:30303",
-    "enode://979b7fa28feeb35a4741660a16076f1943202cb72b6af70d327f053e248bab9ba81760f39d0701ef1d8f89cc1fbd2cacba0710a12cd5314d5e0c9021aa3637f9@5.1.83.226:30303",
+    "enode://09fcd36d553044c8b499b9b9e13a228ffd99572c513f77073d41f009717c464cd4399c0e665d6aff1590324254ee4e698b2b2533b1998dd04d896b9d6aff7895@35.185.67.35:30303",
+    "enode://89e51a34770a0badf8ea18c4c4d2c361cde707abd60031d99b1ab3010363e1898230a516ddb37d974af8d8db1b322779d7fe0caae0617bed4924d1b4968cf92b@35.231.48.142:30303",
+    "enode://b58c0c71f08864c0cf7fa9dea2c4cbefae5ae7a36cc30d286603b24982d25f3ccc056b589119324c51768fc2054b8c529ecf682e06e1e9980170b93ff194ed7a@132.148.132.9:30303",
     "enode://d302f52c8789ad87ee528f1431a67f1aa646c9bec17babb4665dfb3d61de5b9119a70aa77b2147a5f28854092ba09769323c1c552a6ac6f6a34cbcf767e2d2fe@158.69.248.48:30303",
     "enode://c72564bce8331ae298fb8ece113a456e3927d7e5989c2be3e445678b3600579f722410ef9bbfe339335d676af77343cb21b5b1703b7bebc32be85fce937a2220@191.252.185.71:30303",
     "enode://e3ae4d25ee64791ff98bf17c37acf90933359f2505c00f65c84f6863231a32a94153cadb0a462e428f18f35ded6bd91cd91033d26576a28558c22678be9cfaee@5.63.158.137:35555"
@@ -119,7 +116,7 @@
     "0000000000000000000000000000000000000005":{
       "builtin":{
         "name":"modexp",
-        "activate_at":"0x7fffffffffffff",
+        "activate_at":"0x21e88e",
         "pricing":{
           "modexp":{
             "divisor":20
@@ -130,7 +127,7 @@
     "0000000000000000000000000000000000000006":{
       "builtin":{
         "name":"alt_bn128_add",
-        "activate_at":"0x7fffffffffffff",
+        "activate_at":"0x21e88e",
         "pricing":{
           "linear":{
             "base":500,
@@ -142,7 +139,7 @@
     "0000000000000000000000000000000000000007":{
       "builtin":{
         "name":"alt_bn128_mul",
-        "activate_at":"0x7fffffffffffff",
+        "activate_at":"0x21e88e",
         "pricing":{
           "linear":{
             "base":40000,
@@ -154,7 +151,7 @@
     "0000000000000000000000000000000000000008":{
       "builtin":{
         "name":"alt_bn128_pairing",
-        "activate_at":"0x7fffffffffffff",
+        "activate_at":"0x21e88e",
         "pricing":{
           "alt_bn128_pairing":{
             "base":100000,