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

Block 19559

Hash
000000dcc85ff37f13b0d8672b32acd9430307cf77de483d1a256d97af3f9738
Confirmations
21157
Time
2026-10-10 16:22:09 UTC
Median time
2026-10-10 16:13:08 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
df92859e2197ca3071d4eb8768290e41781793fb0717808d9f16450a76ab70b4
Previous block
000000e331869f0d4f21bf972fd11c50af240a2fd4a35434ef589837c7493db3
Next block
00000101f3803709d4f143e074f2733bcdb7b394e2eaf8037d87eb544d9cf7fe

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 19559 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
1c4a885744d695090e143dd61163a77b… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
df92859e2197…450a76ab70b4 coinbase1250