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

Block 18727

Hash
0000011ad5207a7d9749b1053fadbdcebb320984c77cfa1617719db303421c0d
Confirmations
23582
Time
2026-10-09 17:03:18 UTC
Median time
2026-10-09 16:55:24 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
72599e5f0b41d063104fd35e921ca6bfedd26a1e233843bdcc184da95845208d
Previous block
000000891635183283562f77dbc3a1ea4fc2dbb8417eaee12d8085d1da9d422e
Next block
0000011767d3fea3f9636be68dc3b40e74a398ac36cd0bfe4fa87bb4bbd8b932

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 18727 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
a8b841d7dc78d62142f9b6eec187f6c4… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
72599e5f0b41…4da95845208d coinbase1250