Erich Ludwig (1 May 1879 – 14 May 1934) was a German rugby union player who competed in the 1900 Summer Olympics. He was a member of the German rugby union team, which won the silver medal. Germany w
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 0xcd1cc0213ac57b618031516acac5d37a59322d0bfe5399c3bb30280340b13a24. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d980a268-92dd-4c4e-843e-f47e3b04cf97.json and https://artists.proofprofile.net/proofs/artist/d980a268-92dd-4c4e-843e-f47e3b04cf97.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).