Stephan Lehmann (born 15 August 1963) is a Swiss former professional football goalkeeper who works as goalkeeper coach for FC Sion. International career Lehmann was capped 18 times for the Switzerlan
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a56e52a4f134dc5df3b75300648876fbf586cfd33788eb4b4e367de2697362. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/575f32cd-c097-417f-8d2d-6629dfd23b9a.json and https://artists.proofprofile.net/proofs/artist/575f32cd-c097-417f-8d2d-6629dfd23b9a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).