Claudia Fischer (born 24 May 1981 as Claudia Toth) was the Austrian national women's curling team skip, or captain, from 2004-2007. She has played in four European Championships, skipping her Austria
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 0x3e50cc6a1c632ade5a7cdb92ba7852397310ac59d0873de8d5b9746b9d22e8d1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c375234-93b0-4aca-8396-577bc50790ab.json and https://artists.proofprofile.net/proofs/artist/5c375234-93b0-4aca-8396-577bc50790ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Abby - Mit Butch Cassidy auf dem Outlaw Trail