Pardon my newbieness but could you help me identifying which part of the USC block contains the Litecoin hash ? Is it encoded in the transaction script ?
First: find the hash of the USC block (either on the commandline or the debug console):
$ unitedscryptcoind getblockhash 10001
642639f20776313da4c16028388576c68abd96292e963303552d543b5a9b13df
Then get the block (also, either on the commandline or the debug console):
$ unitedscryptcoind getblock 642639f20776313da4c16028388576c68abd96292e963303552d543b5a9b13df
{
"hash" : "642639f20776313da4c16028388576c68abd96292e963303552d543b5a9b13df",
"pow_hash" : "b6238d5686e023cef880c54d1e54c84119060aaed517494bd5c55b2e33d268e3",
"confirmations" : 13361,
"size" : 755,
"height" : 10001,
"version" : 65794,
"merkleroot" : "5abc1162b885a65647f86c99921a118270066eb912ce4b4c977f5ff11b3c66ee",
"auxpow" : {
"size" : 523,
"coinbasetx" : {
"txid" : "082c3ad598cde99850626cda979f120def107c4b2f8fbce2d2aea53da44f812a",
"version" : 1,
"locktime" : 0,
"vin" : [
{
"coinbase" : "03772f07fabe6d6d7897ed5c196dab5acdd4f2e4fcaa5053a6c161932f682a679218dc3a9f4583cf04000000000000004014150500000000f0000000",
"sequence" : 4294967295
}
],
"vout" : [
{
"value" : 50.57290762,
"n" : 0,
"scriptPubKey" : {
"asm" : "OP_DUP OP_HASH160 aa3750aa18b8a0f3f0590731e1fab934856680cf OP_EQUALVERIFY OP_CHECKSIG",
"hex" : "76a914aa3750aa18b8a0f3f0590731e1fab934856680cf88ac",
"reqSigs" : 1,
"type" : "pubkeyhash",
"addresses" : [
"UdW36McKmnRXjRLx8vnv9asH8aaciTFMYq"
]
}
}
]
},
"coinbaseMerkleBranch" : [
"554f31be09c3595593af8ce7a2c8991fade90a0cc32386a2ffeb9f00763d2c15",
"723355cedcbfec93f15c91dce2b74306534f199a353f92a0a79bf8094af26ba1",
"0c5ded666e627d29ec239c30e8cc3494d118d9d132a13d89ecebb4c73c7d1700",
"2a367327c0c174846625808bb182301cde78420531d17db453953763aa1e0cd0",
"3c051b3c07e4a8baf9d01bb64174e87c5fb60026502f6254a6c04c195d656376",
"ca596bfebcaceb304cc9d15b3be6acd09cdc9f7e215ce4fd1789dbee54560994"
],
"coinbaseIndex" : 0,
"chainMerkleBranch" : [
"0000000000000000000000000000000000000000000000000000000000000002",
"c2bf026e62af95cd7b785e2cd5a5f1ec01fafda85886a8ebd34482c0b05dc2c2"
],
"chainIndex" : 3,
"parent_block" : {
"hash" : "a67a73b6dfd5dbb2edd562ba0a42df49d64d3647901af1fc450e3d5ede910752",
"pow_hash" : "000000002a3bd0933fb8ff6e550c7ab77869677f3c0e48bc94d52b05a35a7fd8",
"version" : 2,
"previousblockhash" : "51dd1b4131d9577c78e5dbcd3f0d1d25e360ed343f18792a98ae91d2d18b9d63",
"merkleroot" : "1fd0691c974e0f74cad3dbd4ead2df556cd462b0a0a54567bf15e4d8e5d901e0",
"time" : 1385977750,
"bits" : "1b25ca66",
"difficulty" : 1734.16053808,
"nonce" : 3129217792
}
},
"tx" : [
"5abc1162b885a65647f86c99921a118270066eb912ce4b4c977f5ff11b3c66ee"
],
"time" : 1385977749,
"nonce" : 0,
"bits" : "1d0ffff0",
"difficulty" : 0.06250000,
"previousblockhash" : "ca341881775ac6dc35016335a347723ec88200fbbd06084ee9aa411829305273",
"nextblockhash" : "4d5f5ac55554e376cee23f3dfcf87cc5a428f458e377237b53958c658de28e1e"
}
Now look at auxpow -> parent_block -> previousblockhash
This is the hash of the block on which the parent block is built. Unless it is an orphan, it will exist in the parent's blockchain. In this example, it is LTC block 51dd1b4131d9577c78e5dbcd3f0d1d25e360ed343f18792a98ae91d2d18b9d63.
