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

Block 19153

Hash
0000005a6b068e07a67f1057d2462136e08bd683cc47cc608170c182ee05643d
Confirmations
22919
Time
2026-10-10 05:01:28 UTC
Median time
2026-10-10 04:53:18 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
b1df78c79da8ab0d157922d3747bb32e89e5f4c2d988844d3cb93121362e4316
Previous block
0000010e9484e740df8d75d9b05ef82bc72bdb024b187cc54f1441ae7cf63506
Next block
000000ddebff913ff7ae1cb7e1a0216e4b35844eb29adc3614f17174f954e161

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 19153 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
d57fb4cdad71e8322ee8d775e3bdf657… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
b1df78c79da8…3121362e4316 coinbase1250