Why the very first reward was issued? My understanding that Bitcoin is a reward for miners. Meaning, the node which verified transactions and added a new block to blockchain gets rewarded with some amount of Bitcoins. What transactions were verified? If none, then why reward?
The genisis block was mined by Satoshi himself with a cool encrypted message. So in the beginning there were no bitcoins in circulation. So it had to be mined first with an empty block with only 1 transaction wich is the coinbase blocksubsidy of 50BTC at that time.
Here is the link of the first block:
You can read more about the genisis block here:
To my understanding the genesis block simply contains the declaration of the start of chain with no transactions. Also with its block time it probably produced empty blocks for a few years