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

Block 18428

Hash
000000c6652ec7be78ec3acdcb32469a361e7873567d6ce1035df36ce8f0d039
Confirmations
22086
Time
2026-10-09 08:49:44 UTC
Median time
2026-10-09 08:41:45 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
25c436ad71402b019230172fc8acb18d2f94d23e8b6e9525fa2f11f19ea1a663
Previous block
000000daf7552eafb830d52a8d4302845a03e05941d32d16f3c40f2ab9a822ec
Next block
0000008341e9a777c788ca0050d98fe3fd85cfd331378535c3eec1a740460182

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 18428 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
87c50cf8ccb21ba0fb11a423275c2c75… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
25c436ad7140…11f19ea1a663 coinbase1250