Bitcoin SV’s first halving cut its miner subsidy in half

Bitcoin SV reached block 630,000 at 00:48:30 UTC on April 10, 2020, activating the network’s first scheduled reduction in its block subsidy. The protocol change cut the newly created coins available in each valid block from 12.5 BSV to 6.25 BSV.

The event was mechanical rather than discretionary: no company or committee chose the April 10 calendar time. The threshold was defined by block height, and the time became knowable only when miners produced the qualifying block. WhatsOnChain’s BSV ledger record identifies the block hash, height and UTC timestamp, providing the primary evidence for the date.

What changed at block 630,000

The subsidy is the newly issued portion of a miner’s compensation. Transaction fees are separate, so describing the entire “block reward” as exactly 6.25 BSV would be imprecise. Block 630,000 contained 2,268 transactions and 0.00819151 BSV in total fees according to the explorer. Those figures describe that block only; they are not averages for network use or miner income.

At a target pace of roughly 144 blocks per 24 hours, the programmed issuance rate fell from a nominal 1,800 BSV to 900 BSV per day. That is Coinburn’s calculation of the subsidy schedule, excluding fees. Actual daily issuance could differ because blocks do not arrive on a fixed clock.

Bitcoin SV had emerged from the November 2018 split of Bitcoin Cash and retained the same broad subsidy rhythm inherited from Bitcoin. April 10 was therefore BSV’s first halving as a separate network, even though the underlying schedule had earlier history before the split.

The immediate issue was miner economics

The reduction mattered first to miners. With coin price, difficulty and fees held constant, subsidy revenue per block fell by 50%. Real profitability was more complicated: electricity contracts, machine efficiency, pool performance, block timing and exchange prices varied by operator.

BSV, Bitcoin Cash and Bitcoin all used SHA-256 proof of work, allowing compatible mining equipment to move among the networks. Bitcoin Cash had crossed its own 630,000-block threshold on April 8, while Bitcoin’s corresponding event had not yet occurred. That staggered schedule created a temporary incentive mismatch: miners could compare chains whose subsidies had already halved with Bitcoin, whose subsidy remained 12.5 BTC per block. It did not prove which firms moved equipment or why.

A contemporaneous CoinDesk report placed BSV at $214 at its press time, down 5.4% over the preceding 24 hours, with a reported market capitalization of $3.9 billion. Those are CoinDesk index observations for BSV, not calculations from the block record. The surviving report does not expose an exact snapshot timestamp or venue-level inputs, so the figures are indicative and cannot establish that the halving caused the move.

Why the date mattered

The halving tested whether BSV’s fee market and asset value could support security as issuance declined. In principle, miners respond to expected revenue relative to cost; if hashpower leaves, block production can slow until difficulty mechanisms and profitability adjust. On April 10, however, one block and one price snapshot were insufficient to measure a durable security effect.

The defensible event-day conclusion was narrower: BSV’s monetary schedule executed at the programmed height, cutting nominal new supply and immediately tightening miner economics. Claims about a supply-driven price rally, miner capitulation or a lasting security decline remained unproven.

Later context

On April 15, K33’s predecessor Arcane Research reported, using Glassnode and Coin.Dance data, that BSV’s share of total SHA-256 hash rate had fallen from a 2.39% average to about 1.19%, which it characterized as a 50% reduction. That later estimate supports the concern about miner reallocation, but its published page does not provide the raw observations or a fully reproducible averaging window. It was not knowable from the April 10 block alone.