Andreas Keller (born 1 October 1965) is a former field hockey player from West Germany, who competed at three Summer Olympics for his native country. He won the gold medal with Germany at the 1992 Sum
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 0x1233fe2a1d5dedc08635a351d7066f2572d6377b35e4fc4169d564bc5aab672b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f66a8ee-092f-4e32-bb57-c037f9df4b1f.json and https://artists.proofprofile.net/proofs/artist/8f66a8ee-092f-4e32-bb57-c037f9df4b1f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).