Wolfgang Baumgart (23 October 1949 in Inheiden – 21 February 2011) was a German field hockey player who competed in the 1968 Summer Olympics and in the 1972 Summer Olympics. References External link
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 0x8656c867df8e9d60c67e98132ea7ce306295d1fbead4a912daafd44a02bc6b39. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0be4c6b-df71-4bfc-8403-b414ff0d26fe.json and https://artists.proofprofile.net/proofs/artist/f0be4c6b-df71-4bfc-8403-b414ff0d26fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).