VSK may refer to: VSK Bandy, Swedish bandy club VSK Osterholz-Scharmbeck, German football club Pécsi VSK (men's water polo) VSK-94, sniper rifle HIW VSK, carbine VSK Insurance, Russian insurance comp
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465f8b585b58b0d3d1126074f6ac90056a98051a9296492c76498af62b850a62. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d30a0cc-9082-4c1a-98ad-a5cf5c5f4f93.json and https://artists.proofprofile.net/proofs/artist/6d30a0cc-9082-4c1a-98ad-a5cf5c5f4f93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).