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

Block 19194

Hash
00000057c1869d54c1e840e10655ec5ff76f69476977f7020d5a97c8c1386fb8
Confirmations
22547
Time
2026-10-10 06:10:14 UTC
Median time
2026-10-10 06:01:30 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
d254f4c71dcbcc67cfe334c7f55b02e1d7fb65609e15b09a1c15eea49990b9ce
Previous block
000000a8ec6ea913a45efb53782a2a16d927e4a491cb0c8a9e8ea88d764ae537
Next block
0000008bbd6bcb263d533d2130781ec76a8174bb7f24567610371939d553e869

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 19194 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
0769ba538ae5d1ffc45d556fd6464504… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
d254f4c71dcb…eea49990b9ce coinbase1250