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

Block 19218

Hash
000000b74603c1a09eb1953514681dc39fb6caa640deaf158799f619226ac30a
Confirmations
22633
Time
2026-10-10 06:51:06 UTC
Median time
2026-10-10 06:42:35 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
57e2c09f88a7e68d770462ebd8c13ee783d3ecaeac1a534263f0ab88eeda3f32
Previous block
000000f3c7200134a3502fcebfa9b43d5ae3487bd18054d43ea0c2085680750a
Next block
00000064271a7741f5fe343e8fca2945c9258b9604140d76b9f7254fb37a80d3

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 19218 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
b8bd54625d3d961241f3fdd5b44c06bf… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
57e2c09f88a7…ab88eeda3f32 coinbase1250