curl --request GET \
  --url https://mainnet.mirrornode.hedera.com/api/v1/blocks/{hashOrNumber}

{
  "count": 3,
  "gas_used": 300000,
  "hapi_version": "0.11.0",
  "hash": "0x3c08bbbee74d287b1dcd3f0ca6d1d2cb92c90883c4acf9747de9f3f3162ad25b999fc7e86699f60f2a3fb3ed9a646c6b",
  "logs_bloom": "0x00000020002000001000000000000000000000000000000000000000000010000000000004000000000000000000000000108000000000000000000080000000000004000000000000000000000000880000000000000000000101000000000000000000000000000000000000008000000000000400000080000000000001000000000000000000000000000000000000000000002000000000100000100000200000040000100000001000000000000000000000000000000001001000004000000000000000000001000000000000000000100000000000100000000000000000000000000000000000000000000000080000100800000000000000120080",
  "name": "2022-05-03T06_46_26.060890949Z.rcd",
  "number": 77,
  "previous_hash": "0xf7d6481f659c866c35391ee230c374f163642ebf13a5e604e04a95a9ca48a298dc2dfa10f51bcbaab8ae23bc6d662a0b",
  "size": 8192,
  "timestamp": {
    "from": "1651560386.060890949",
    "to": "1651560386.661997287"
  }
}