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

Block 18737

Hash
0000004f4fb3c82853e641be11fd5e9fc348dd20c09420c3e23915b34c0d69e1
Confirmations
23415
Time
2026-10-09 17:19:18 UTC
Median time
2026-10-09 17:11:07 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
5c9df44bb31739e03ab8feba6bb9514ca9f63879334923c2a9589e06a5ba509c
Previous block
000000e91360e414d62b33991e84044621b72ae614e4806249913d35d7dd08d0
Next block
0000011bb1f8e0451b87cdc5434f192a0a29a9f819a99dc261000ba921cbf96a

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 18737 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
4a767bb9bbbf4ef378a4b4796d39794a… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
5c9df44bb317…9e06a5ba509c coinbase1250