Returns information about a block header given its hash.
blockhashstringREQUIREDverbosebooleanoptionalcurl --user myuser --data-binary '{"jsonrpc":"1.0","id":"1","method":"getblockheader","params":["00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09"]}' -H 'content-type:text/plain;' http://127.0.0.1:8332/{
"hash": "00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09",
"confirmations": 872561,
"height": 1000,
"version": 1,
"merkleroot": "fe28050b93...",
"time": 1232346882
}