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

Block 18354

Hash
0000008b5a729e5e61e60c722d5ed859be6eeb5a70c1008abaf1306842bff36e
Confirmations
23851
Time
2026-10-09 06:44:25 UTC
Median time
2026-10-09 06:35:41 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
2a65569dfd4c2e586fadd49646f1686502b04c5b663a9727eeebca0a0a11843d
Previous block
000000a71ff437e0613b38626a5d794492d6346f1432b069d909d2f077065fe9
Next block
000000e1df202580f963bd3e305a80958a5b27c8439c3ee4e82b7c1e00ab1118

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 18354 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
0c31a0b488265df219665e41c1ab4390… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
2a65569dfd4c…ca0a0a11843d coinbase1250