AFK Sistema PAO is a large Russian conglomerate company, founded by Vladimir Yevtushenkov, who was chairman of the corporation's board of directors until 2022. In April, Yevtushenkov's shareholding in
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 0xc78ff16955d02753e4ee5d4362811a2900529f5d0eb50bbe65971cd583c94201. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5510750-40b4-47c3-8043-7a68c2cb3d47.json and https://artists.proofprofile.net/proofs/artist/d5510750-40b4-47c3-8043-7a68c2cb3d47.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.