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

Block 18433

Hash
000000a4c4a914edd882be5bc62e08744aebb708794592e5bff69d7fa4b6e181
Confirmations
22187
Time
2026-10-09 08:57:57 UTC
Median time
2026-10-09 08:49:44 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
9669b1b02928fd87164f6255708b6bc56768f1c2131fc5c8f677dfa888c76762
Previous block
000000c48b13edffef2881f84d0eb0bdfc69ff54b284fa3efad338b29d39061f
Next block
000000fa0f955a73cbc828dbc6106d291ef101cd2016e1479d0b0203d344c3e3

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 18433 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
6b5eb6fa220d1a79e27dbf1f29bdaaee… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
9669b1b02928…dfa888c76762 coinbase1250