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

Block 19616

Hash
0000006286664702731d951bcc893d9d118d0dce5d719b61f170045bc366b001
Confirmations
22765
Time
2026-10-10 17:57:13 UTC
Median time
2026-10-10 17:48:47 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
2fe8e518c42f7b872cefbf9eed5b46168be388cc48bfc34b5b31933621af5e60
Previous block
0000001d6c3593b43b5c2a8a63aba82d78126862d561c222f050f706029875b5
Next block
000000679b05365e01668a14a7806885b1e139eb34fd265e33a0ff78c5ae7df3

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 19616 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
584b945b6280006925bdf1e00f4e90c6… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
2fe8e518c42f…933621af5e60 coinbase1250