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

Block 18613

Hash
000000cacbc1bc95dbab837e6b9fc246831fd81326a0126fa11dcdc7ca82d0dc
Confirmations
22135
Time
2026-10-09 13:55:11 UTC
Median time
2026-10-09 13:46:38 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
420e3831c188469e710ebfb90b587169c75c99ba2f6d9de10ac44e5709258e00
Previous block
000000794680a625b9aa0c33d979a4ca53eabee8fb688ca1e9d8919f9de71cd3
Next block
000000fb80b3cd7be6bac28baec37558ce5284b612f4ec2e6b1b5eecc551b557

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 18613 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
ee03d0f02de1bcd204776438c596d547… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
420e3831c188…4e5709258e00 coinbase1250