Alexander Achten (born Alexander Weber; 4 January 1978) is a German-born Argentine fencer. He won a bronze medal in the team sabre event at the 2000 Summer Olympics. See also List of Pennsylvania Sta
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 0x3f371f9994d2abbd4fec1d49ebac81716d99df28c9699b67e23c0341fb137e89. 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/e2c020c9-4e8f-4647-b120-0e9cfe1c54be.json and https://artists.proofprofile.net/proofs/artist/e2c020c9-4e8f-4647-b120-0e9cfe1c54be.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).