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

Block 18916

Hash
00000034f255178bd3d6142698ffcc78308a1c1a3f1fe821c162f40664315bef
Confirmations
22013
Time
2026-10-09 22:17:41 UTC
Median time
2026-10-09 22:09:36 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
0ed8a76dbe39d2ad283307ff3cefd8fcd8ee0fc9d0d3a0bbadda87eb63771691
Previous block
000000739e4abbde59d44815d66ab8576b3a936e74d47b496d94e5fcd2f4b0a1
Next block
000000d5730cdfcf1c482783e9e5198816c2dc20613b2370e94d4c22382400cd

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 18916 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
18566d099b45ad0f8ef5b4c0a951a3c1… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
0ed8a76dbe39…87eb63771691 coinbase1250