Sir William Felix Browder, (born 23 April 1964) is an American-born British financier and political activist. He is the CEO and co-founder of Hermitage Capital Management, the investment advisor to t
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 0x4381be05e557d175df6c76afc54504bdcf1c0526a572f8614b906815d658328d. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/301b7b2d-d486-4ede-8436-2dd497074149.json and https://artists.proofprofile.net/proofs/artist/301b7b2d-d486-4ede-8436-2dd497074149.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Red Notice - Wie ich Putins Staatsfeind Nr. 1 wurde