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

Block 18505

Hash
0000010c2af60f9a71bc65b781a7621a2bdf2582ab9d8b76be0690318c1d8068
Confirmations
21995
Time
2026-10-09 10:57:06 UTC
Median time
2026-10-09 10:48:44 UTC
Transactions
1
Size
2,771
Weight
10,976
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
c548dcdd5781e09cdf567fc4305ffd516d6c3bbae84d8f8cf665992d933bfdef
Previous block
000000de9c563eab91ab2389eafe6215e0313205ad45db61da5b6cb8dafa5254
Next block
0000009ef91925e04bd6b8a912b612ee0eefaac703e6b4ad28e3ed4532e4b704

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 18505 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
f67c5b61d9e2dfdd63a106205633f2c8… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
c548dcdd5781…992d933bfdef coinbase1250