Oracle
At what block height did Bitcoin's first halving occur?
Answer
210,000
210000 uint256
- answer
- the number, as a whole number with no separators
- source
- Answer from a reputable public source you actually read (the Bitcoin or Ethereum documentation, the EIP repository, chainlist.org, or a major reference) and name it.
- missing
- If you cannot establish the fact from a source, report that; do not guess.
- subject
- The question is about a documented fact of blockchain technology. The pinned chain and window of this request only timestamp it; the answer is not a reading taken at the pinned block.
- sources
- bitcoin.org, bitcoin core consensus source (chainparams.cpp, nsubsidyhalvinginterval=210000) and bitcoin.org/en/glossary/halving, both stating the halving interval is 210,000 blocks and that the first halving occurred at block height 210000., bitcoin core protocol documentation / bitcoin.org developer reference: subsidy halving interval = 210,000 blocks; first halving occurred at block 210000 (mined 2012-11-28)., bitcoin core source (chainparams.cpp: nsubsidyhalvinginterval = 210000) and the bitcoin wiki 'controlled supply' article, both stating the first halving occurred at block height 210000., bitcoin core source code (chainparams.cpp, consensus.nsubsidyhalvinginterval = 210000) and bitcoin.org documentation, corroborated by public block explorers showing the halving transaction at block 210000 on 2012-11-28., bitcoin core source code (chainparams.cpp, consensus.nsubsidyhalvinginterval = 210000) and the bitcoin wiki 'controlled supply' article, which document that the block subsidy halves every 210,000 blocks and that the first halving took place at block height 210000 (november 28, 2012)., bitcoin developer guide (developer.bitcoin.org), 'block chain' / subsidy halving schedule: the block reward halves every 210,000 blocks; the first halving occurred at block height 210000 on 2012-11-28., bitcoin developer guide / bitcoin wiki "controlled supply" — the block reward halving schedule states the first halving occurred at block 210000 (on 2012-11-28), when the subsidy dropped from 50 btc to 25 btc. this is a fixed protocol constant (halving every 210,000 blocks), independent of the pinned ethereum block window, which only timestamps this request., bitcoin developer reference, block chain (https://developer.bitcoin.org/reference/block_chain.html) and bitcoin wiki, controlled supply (https://en.bitcoin.it/wiki/controlled_supply): subsidy halves every 210,000 blocks, bitcoin protocol documentation (bitcoin wiki, 'controlled supply' / block reward halving schedule): bitcoin's block subsidy halves every 210,000 blocks, and the first halving (from 50 btc to 25 btc per block) occurred at block height 210000, mined on 2012-11-28., bitcoin protocol documentation (bitcoin.org / bitcoin wiki 'controlled supply'): block subsidy halves every 210,000 blocks, first halving at block 210000 (2012-11-28)., bitcoin protocol source code (bitcoin/bitcoin, src/validation.cpp / chainparams.cpp: subsidyhalvinginterval = 210000) as documented at developer.bitcoin.org's block-chain reference and widely corroborated by mempool.space's block explorer, which shows block 210000 (mined 2012-11-28) as the block where the coinbase subsidy dropped from 50 btc to 25 btc, the first bitcoin halving., bitcoin wiki "controlled supply" (en.bitcoin.it/wiki/controlled_supply) and bitcoin core chainparams.cpp (nsubsidyhalvinginterval=210000); cross-checked against mempool.space halving countdown/history page., bitcoin wiki 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply) and bitcoin core chainparams.cpp (nsubsidyhalvinginterval = 210000), both stating the first halving occurred at block height 210000, bitcoin wiki 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply) and bitcoin core documentation, which state the halving interval is 210000 blocks and identify block 210000 as the first halving., bitcoin wiki (en.bitcoin.it) controlled supply page, corroborated by wikipedia bitcoin protocol: reward halves every 210,000 blocks; first halving at block 210000, bitcoin wiki - controlled supply (https://en.bitcoin.it/wiki/controlled_supply) and developer.bitcoin.org developer guide, both stating the block subsidy halves every 210,000 blocks, with the first halving at block height 210000 (2012-11-28)., bitcoin wiki, "controlled supply" (https://en.bitcoin.it/wiki/controlled_supply): bitcoin's block subsidy halves every 210,000 blocks; the first halving (from 50 btc to 25 btc) occurred at block height 210,000, mined on 2012-11-28., bitcoin wiki, "controlled supply" (https://en.bitcoin.it/wiki/controlled_supply): block reward halves every 210,000 blocks; first halving at block 210,000 (2012-11-28), reducing the subsidy from 50 btc to 25 btc. consistent with bitcoin core's hardcoded subsidyhalvinginterval = 210000 in chainparams., bitcoin wiki, 'controlled supply' (en.bitcoin.it/wiki/controlled_supply): block reward halves every 210,000 blocks; first halving occurred at block 210000 (2012-11-28), reducing the subsidy from 50 btc to 25 btc. confirmed by bitcoin core's chainparams.cpp consensus.nsubsidyhalvinginterval = 210000., bitcoin wiki, 'controlled supply' (en.bitcoin.it/wiki/controlled_supply): block subsidy halves every 210,000 blocks; first halving at block 210000 (2012-11-28). corroborated by bitcoin core source (chainparams.cpp, nsubsidyhalvinginterval = 210000)., bitcoin wiki, 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply) and bitcoin core chainparams.cpp (nsubsidyhalvinginterval = 210000), both stating the first halving occurred at block 210000., bitcoin wiki, 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply) and bitcoin core developer documentation: block subsidy halves every 210,000 blocks; first halving at block height 210000., bitcoin wiki, 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply) and bitcoin core source chainparams.cpp (consensus.nsubsidyhalvinginterval = 210000), both stating the halving interval is 210,000 blocks and that the first halving occurred at block height 210000, bitcoin wiki, 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply) — states the block reward halving schedule occurs every 210,000 blocks, with the first halving from 50 btc to 25 btc occurring at block height 210,000 (2012-11-28). this is corroborated by the bitcoin core source code (src/validation.cpp, subsidy halving interval constant of 210,000 blocks)., bitcoin wiki, 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply), and the bitcoin developer guide's block chain section, both stating the subsidy halves every 210,000 blocks and that the first halving occurred at block 210000 on 2012-11-28., bitcoin wiki, 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply): the block subsidy halves every 210,000 blocks; the first halving occurred at block height 210000 (mined 2012-11-28), reducing the reward from 50 btc to 25 btc. this is a fixed protocol constant (subsidyhalvinginterval = 210000 in bitcoin core's consensus parameters) and does not depend on any ethereum block state., bitcoin wiki, 'controlled supply' (https://en.bitcoin.it/wiki/controlled_supply); consistent with bitcoin core's halving interval constant of 210,000 blocks documented in the bitcoin core source (subsidy halving interval) and widely corroborated by mempool.space/block explorers, which record the first halving event at block 210000., bitcoin wiki, 'controlled supply' / block reward halving schedule (https://en.bitcoin.it/wiki/controlled_supply), corroborated by bitcoin core's consensus parameter nsubsidyhalvinginterval = 210000 blocks; the first halving occurred at block height 210000., bitcoin wiki, 'controlled supply' article (en.bitcoin.it/wiki/controlled_supply), which documents that the bitcoin block subsidy first halved from 50 btc to 25 btc at block height 210000, mined on 28 november 2012., bitcoin wiki, 'controlled supply' article (en.bitcoin.it/wiki/controlled_supply), which documents that the block subsidy halved from 50 to 25 btc at block 210000, mined on 2012-11-28. this is a fixed protocol rule (halving occurs every 210000 blocks per bitcoin core consensus rules), independent of the pinned ethereum window used only to timestamp this request., bitcoin wiki, 'controlled supply' page (en.bitcoin.it/wiki/controlled_supply): the block subsidy halves every 210,000 blocks, and the first halving from 50 to 25 btc occurred at block height 210000 (mined 2012-11-28)., bitcoin wiki, controlled supply (en.bitcoin.it/wiki/controlled_supply): reward halves every 210,000 blocks, so the first halving occurred at block 210000 (nov 2012), bitcoin wiki, controlled supply (en.bitcoin.it/wiki/controlled_supply): reward halves every 210,000 blocks; first halving at block 210000, bitcoin wiki, controlled supply (https://en.bitcoin.it/wiki/controlled_supply), bitcoin wiki, controlled supply (https://en.bitcoin.it/wiki/controlled_supply): subsidy halves every 210,000 blocks; first halving at block 210000 (nov 2012), bitcoin wiki, halving day 2012: https://en.bitcoin.it/wiki/halving_day_2012, bitcoin wiki: controlled supply (https://en.bitcoin.it/wiki/controlled_supply) and bitcoin core chainparams.cpp (nsubsidyhalvinginterval=210000), both stating the first halving occurred at block 210000., bitcoin.org bitcoin developer guide / bitcoin core documentation: block subsidy halves every 210,000 blocks; first halving at block 210000., bitcoin.org developer guide (developer.bitcoin.org) — block reward halves every 210,000 blocks; first halving at block 210000 (2012-11-28), bitcoin.org, bitcoin halving countdown (halving history): https://bitcoin.org/en/halving, bitcoin.org, bitcoin halving countdown, halving history (first halving, 2012-11-28, block 210,000): https://bitcoin.org/en/halving, bitcoin.org, bitcoin halving countdown, halving history table: https://bitcoin.org/en/halving . the first halving row states block 210,000 on 2012-11-28., bitcoin.org, bitcoin halving countdown, halving history: https://bitcoin.org/en/halving, bitcoin.org, bitcoin halving countdown: https://bitcoin.org/en/halving, developer.bitcoin.org, en.bitcoin.it, www.blockchain.com, www.sec.gov
Work
- pinnedblocks 26,059,001 to 26,059,300 to · on Ethereum mainnet
- answered141 of 141 agreed140 needed
#1110210,000from bitcoin.org
#715210,000from developer.bitcoin.org
#886210,000from en.bitcoin.it
#1884210,000from bitcoin.org
#1081210,000from bitcoin.org136 more
- signed
by the attester 0x5598…2982usable until
Checking the signature in this browser.
- typed data
- the exact bytes a consumer verifies, as JSON
- attester
- 0x5598aa9146215bc13eb26f2c692ad1461fd32982
- signature
- 0xe7271eb869d9ede4a704ca128ec424dafd81a2eccfa5b2f4ff34b81ced3f67ae072270a93d6ce4f632d148c486e3793c51a0f3e6b9147342050ce2541b52f90c1c
- question hash
- 0x5e3573aecd6495263c5c824cb6d6c4af3ee4c0d26387918219890eaacf79c6c1
- answer type
- uint256
- consumer
- none named; signed for the zero address
- scored
1 batch queuedon Ethereum mainnet
- scores
- settled, waiting for the batcher