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

Block 18853

Hash
0000003ef53e8b516ce83723d7a07694bc89061600aadf91565cad0e5a2e649a
Confirmations
23442
Time
2026-10-09 20:31:29 UTC
Median time
2026-10-09 20:23:30 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
8e1e6e56c4b5da5f7de9934b18d8c15e4a556b367e31a93390a20a721cdf37e4
Previous block
0000001de58928619cbf7f5c4e413bc83abd42fe4fbab59216421b7dff7e3868
Next block
00000092a388a654b36e77fc58f8525b8606e529b48fd65a30db4442d500bac2

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 18853 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
823fce534e45c29d229f0cda639f3931… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
8e1e6e56c4b5…0a721cdf37e4 coinbase1250