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

Block 19775

Hash
000000583d478f34f6c4eefbf3590fdc3bbbf314333dca306cd291fdd62813e0
Confirmations
21145
Time
2026-10-10 22:26:32 UTC
Median time
2026-10-10 22:17:48 UTC
Transactions
1
Size
2,771
Weight
10,976
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
815e76b655965b74f10a65048c8d5f5a98c0fb976fe3addac9e0cab7b352f873
Previous block
00000100dbc5bc1e421637850aa762d36ef17e6c8671a78c0603986ebee49878
Next block
0000003f9ec3e8d9679cf632712abeacf80e8fa536716e18d7ba890f5c257fc3

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 19775 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
464711f9cbb9ed984d3b2fdec598bd2b… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
815e76b65596…cab7b352f873 coinbase1250