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

Block 18653

Hash
000000efcb7fb04bc438caa70566ddb97a8368dce57fdca6da50f17ece713d00
Confirmations
23434
Time
2026-10-09 15:00:19 UTC
Median time
2026-10-09 14:52:16 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
5d836a9dc4db4b99cab3689b0f71fa918890d4f4e064ffe7314af320e003fd80
Previous block
000000decb256678978c40012b53a993a078f417dd6931b40e66e5801bf1b2b8
Next block
000000e368ddff57116670ad137171c1c8b7c2fa8bb2c7fb9f49d9d73aaccb7f

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 18653 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
6e927219170ff035554728c2c49a3c63… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
5d836a9dc4db…f320e003fd80 coinbase1250