Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 18649

Hash
000000809e548e7cea67418627649156491ca7111f9947e78cbb330fdc027135
Confirmations
23362
Time
2026-10-09 14:53:56 UTC
Median time
2026-10-09 14:45:42 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
8a124ef986b71e92907c04ad5e154a0be1cb8056bc63091cc626d5a86a77d57a
Previous block
000000df7d197d36dd0a74e10ece875deaf481b4cdcdfc7c7464f02fed8d7f3e
Next block
00000063c7dcf1f7cfecdab8079d497bf3e6045354969fc565dd5f3391fdd01f

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 18649 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
2107545b6ad9c101d25c4309255cd32e… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
8a124ef986b7…d5a86a77d57a coinbase1250