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

Block 19531

Hash
000000cc6c1952a5107eb2b606c06c0e4180d0dd74dd2042104924fbdd088dbc
Confirmations
22176
Time
2026-10-10 15:35:13 UTC
Median time
2026-10-10 15:26:50 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
f1d1c4a0712e05ce45245fd1ab8ce4fbcce317848aa55324e49d66db4ecdd404
Previous block
000000d8930da6663fd4d25495a58842ed88eede0a9f93f210cad28c6c31e83b
Next block
00000065f3445f288330c995646cbf27190ee8bd1076ac36890f661e00ca8edc

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 19531 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
5e54c452127980c21ef273ce0e4a108d… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
f1d1c4a0712e…66db4ecdd404 coinbase1250