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

Block 19189

Hash
00000040ea9c80561f4c85f3bc9a27a48fb3abfada47342c1bce1494df2a360f
Confirmations
22659
Time
2026-10-10 06:01:30 UTC
Median time
2026-10-10 05:53:22 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
d5424d50b37af52a6d5026bd28aaac5b7cd010b1c9e701fc237e8af8dbfa762d
Previous block
0000009f13a8fe5dd8c8459c146176ac18f3caf169fa8acca4b6e484897f23a7
Next block
0000005fd3520c2e4f45f70a67c379837e7b98f72fdf663ee53925fd2830ae7e

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 19189 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
920c1954b24bd56048e345c72ee7a300… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
d5424d50b37a…8af8dbfa762d coinbase1250