Block #847,294 mined 1m 40s ago
↑ 1.4%
Halving · v4 — supply locked

Bitcoin scarcity,
ledgered.

The supply schedule is the only monetary policy that ships in code. Halving turns it into an API — query the issuance curve, stream miner rewards, and trace any coin back to the coinbase that minted it.

See the primitives
19,847,294
circulating
3.125
block subsidy
94.6%
of 21M mined
block #847,294
live
subsidy + fees3.607 BTC
won byFoundry USA · 28.4%
8f3a…d21c47.2 BTCfee 0.00041
1c0e…9b4812.084 BTCfee 0.00012
a91d…0e7f0.428 BTCfee 0.00006
3b22…44a1189.04 BTCfee 0.00128
ec47…77b32.114 BTCfee 0.00009
2,847 tx · 1.42 MBexplore
Settled on Bitcoin · indexed by Halving v4.2.0
Covered by11 outlets · 2 protocols
CoindeskBanklessThe BlockDecryptGalaxyNorthwind LabsMercury ProtocolFoundry 47Plover ValidatorsSubstrateHelvetia CartographicCoindeskBanklessThe BlockDecryptGalaxyNorthwind LabsMercury ProtocolFoundry 47Plover ValidatorsSubstrateHelvetia Cartographic
The dashboard

Four panes.
One ledger.

Subsidy curve, miner attribution, holdings rollup, fee market. Each pane is a first-class endpoint — render it, stream it, snapshot it. No CSV exports.

Tx stream
847,294 → 847,290
9b4c…11e00.428 BTC+ 2s
21d8…7b0447.224 BTC+ 6s
fe33…0a91189.04 BTC+ 11s
8c70…44fb0.0084 BTC+ 18s
3a1e…cc0212.084 BTC+ 24s
70bd…91aa0.482 BTC+ 31s
Treasury holdings
live
1,847.2
BTC · attributed to 3 addresses
cold (Foundry HSM)1,604.0
warm (multisig 2/3)182.4
hot (operations)60.8
market cap exposure$118.4M
Pool attribution
last 144 blocks
Foundry USA28.4%
Antpool21.8%
ViaBTC14.2%
F2Pool12.6%
Binance Pool9.4%
Other13.6%
Fee market — sat/vB
24h · median 8.3
low
3.1
median
8.3
priority
14.7
next block
22.4
Primitives

Four ways teams ship on Halving.

01
Supply schedule

Issuance, halved every 210,000 blocks.

Halving exposes the issuance curve as a first-class object — query it, subscribe to it, render it. The next reward drop is locked in at block 1,050,000.

3.125 BTC
post-halving block subsidy
02
Stock-to-flow

Tabular S2F at any historical block.

Compute stock-to-flow over any window — by block, by epoch, by date. Halving gives back the math, the methodology, and the source ranges in one response.

112.4
current S2F ratio
03
Miner reward stream

Subsidy + fees, per block, per pool.

Stream miner revenue as it lands — subsidy split from fees, attributed to the winning pool, with confirmation depth and reorg signal in the same payload.

47.2 BTC
median fee revenue per block
04
Provenance receipts

Every coin, traced to coinbase.

Walk any UTXO back to the coinbase that minted it. Halving caches the path so your audit team gets the lineage in 8 ms, not eight hours.

894M
UTXOs indexed live

Trustless
vs centralized.

Five places where on-chain provenance beats a quarterly PDF. The data is public — we just made it queryable in production.

Capability
Trustless / on-chain
Centralized exchange
Issuance source-of-truth
On-chain coinbase
PDF report, quarterly
Reward attribution
Per block, per pool
Aggregated, monthly
S2F query window
Any block height
Last 12 months only
Audit lineage
UTXO → coinbase, 8 ms
8 hours of CSV joins
Cost per query
$0.0008
$0.18 + seat fee
Halving was the first issuance dataset our auditors accepted without follow-up. The lineage receipts ended a three-week back-and-forth.
AP
Adelaida Pérez-Costa
Head of Treasury, Mercury Protocol
$1.4B
Treasury under audit
1.4M
Coinbase lookups / day
47.2k
Webhook subscribers
8.3 sat/vB
Median fee tracked

Pricing,
without seats.

Pay for queries, not seats. Pay for streams, not viewers. No per-user pricing — your whole desk gets in for the same price.

Free
$0/ month

Read-only. Last 1,008 blocks (~7 days).

  • +1 API key
  • +Public S2F endpoint
  • +Coinbase lookups
  • +Community Discord
— recommended
Pro
$248/ month

Full archive, miner streams, audit lineage.

  • +10 API keys
  • +Full block-1 archive
  • +Miner reward stream (WebSocket)
  • +UTXO → coinbase lineage
  • +Webhook alerts on halvings
  • +8h SLA, business hours
Validator
Customannual

Pool-grade — for desks, custodians, and L2 issuers.

  • +Unlimited keys
  • +Private node + raw mempool
  • +Reorg-safe finality stream
  • +Audit pack on demand
  • +1h SLA + 24×7 incident channel
  • +Trail of Bits attestation
FAQ

On-chain mechanics.

Custody, reorgs, indexing cadence — answered for the auditor and the engineer in the same paragraph.

No. Halving never holds keys, never signs transactions, never custodies funds. It is a read-only index over the public Bitcoin chain — you bring your wallet, we hand back the data.

Protocol upgrades

Recent blocks of work.

Full changelog
Apr 04Protocol

Block 1,050,000 — fourth halving cleared. Subsidy dropped to 3.125 BTC.

Mar 21Index

Coinbase lineage now resolves Taproot leaf paths in the audit response.

Feb 14Stream

Miner reward WebSocket now attributes Antpool, Foundry USA, and ViaBTC outputs natively.

Jan 30API

S2F endpoint now accepts arbitrary block ranges and returns flow components separately.

The supply schedule
is open. Connect a wallet.

No seat fees. No quarterly PDFs. The chain is the source of truth — Halving just made it queryable.

Or read the docs