Transactions1
Median fee0.00 sat/vB▼ 0.00
Time since previous block12:02
Total fees0.0000 BTC
Block reward50.0000 BTCSubsidy: 50.000 BTC
Size0.00 MBWeight: 0.00 MWU
About block 10,000
Bitcoin block 10,000 was mined by Unknown on April 6, 2009 at 3:23 AM UTC, 12 min 2 s after block 9,999. That is slower than the 10-minute target; long gaps are normal, since every hash attempt is an independent draw with the same tiny chance.
It confirmed 1 transactions in 0.00 MB (0.0% of the 4 million weight-unit limit). The median transaction paid 0.00 sat/vB, and all fees added up to 0.0000 BTC. With the 50.000 BTC subsidy of halving era 1, Unknown earned 50.0000 BTC for this block.
Block 10,000 is number 1,937 of 2,016 in difficulty epoch 4; 79 blocks remain until the next difficulty adjustment at block 10,079. The next halving is at block 210,000, 200,000 blocks after this one.
Its hash starts with 8 zeros: that is the proof of work, a number below the target that the whole network’s hashrate had to search for. Unknown found 2 blocks in the week before. Today the block has 965,473 confirmations, so it is settled beyond any practical doubt.
Why block 10,000 is notable
Height 10,000 is a round milestone, one of the multiples of 10,000 that mark the chain’s progress. Consensus rules ignore round numbers, so nodes checked this block exactly like its neighbours, but heights like this are useful reference points. It arrived 0.3 years after the genesis block of 3 January 2009, an average of 13 min 18 s per block across the whole chain up to that point. From here, 990,000 blocks remained to block 1,000,000: about 18.8 years at the 10-minute target.
Countdown to block 1,000,000 →
What’s inside a Bitcoin block
Every block, 10,000 included, is made of the same parts:
- Header
- Eighty bytes that miners hash over and over: the version, the hash of the previous block, the Merkle root that summarises every transaction, a timestamp, the difficulty target in compact form and a nonce. A block is valid when the hash of its header falls below the target.
- Coinbase transaction
- The first transaction, written by the miner. It spends no inputs: it creates the subsidy and collects the fees, and since BIP 34 it must also record the block height.
- Transactions
- Everything else in the block: payments taken from the mempool, usually picked by fee rate because space is capped at 4 million weight units. Block 10,000 holds 1, counting the coinbase.
- Fees
- The difference between what each transaction spends and what it creates. The miner claims them in the coinbase; they are the part of the reward set by demand rather than by the protocol.
- Subsidy
- New bitcoin created by the block, fixed by the halving schedule: 50 BTC at the start, halved every 210,000 blocks. At height 10,000 it is 50 BTC.