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

Block 19538

Hash
00000030067eeb3b4f91f270bad208736a883d4c36cc844f3a46f1c6cf6e59ee
Confirmations
22027
Time
2026-10-10 15:46:59 UTC
Median time
2026-10-10 15:38:34 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
6e16be8a62cc5a917ea82bf60edfca201de44f05381602d4463b43a9a46f7738
Previous block
000000c13ae4cea63c4738db723650d3d465a846ef9b661848fd34ffbdb4fcae
Next block
0000005fb7b76c0f4163fe8db5c2ef3769693c0f30b704aac7e69c5db1b8fd38

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 19538 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
c4b36e0fa0bfef7d360a27a7e42d55b0… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
6e16be8a62cc…43a9a46f7738 coinbase1250