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

Block 19025

Hash
000000639dcc9aeea23967f5b790d44df6f71fe83857d512b300d9aabab409d4
Confirmations
22502
Time
2026-10-10 01:21:49 UTC
Median time
2026-10-10 01:13:48 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
a445d9c77c543cc6194462a44d162a2eab2a42900daa33a6bae5d8911cb736e5
Previous block
000000619fc401bb7bd19396e79244c5e1c07ac55d9781df0dfcd341678e51aa
Next block
0000005d7743a3ac7281243026b5188b31a8255fcfc6ad27cb50f5ffd100407f

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 19025 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
7d7f7f00de0f18bcdfdebdb0eab1858a… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
a445d9c77c54…d8911cb736e5 coinbase1250