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

Block 19131

Hash
00000103f6e40eceb30072b43ca85289b0721ce22897b93ac2ae3b9c61f41166
Confirmations
22161
Time
2026-10-10 04:24:55 UTC
Median time
2026-10-10 04:16:40 UTC
Transactions
2
Size
3,046
Weight
11,665
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
fb17258ebbfb7fdd0f46d241775db86cf3225976454c3a152fe9859cbac78f68
Previous block
000000f0e9da9194f3051657b47d30c3044c98b4d06ed42d7ac296172603569c
Next block
000000150883dc9999ebf1ce424474c270731ed2110f1c11aac211b107f4cbb0

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 19131 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
f8fc7d6a46db7ae26d1a49739f0ac8f7… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
b01a8bd737ab…d027aa3b6897 coinbase1250.00000344
b70a6afa9603…6501615b5ad1 spends P2MR pays to P2MR120.999996560.00000344