Pupping is a municipality in the district of Eferding in the Austrian state of Upper Austria. St. Wolfgang of Regensburg died here in the Chapel of Saint Othmar while on his way to Hungary for a missi
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 0xa3b6f9cf451ed6937c4da49dcb43738101f2973aa1aca6ffddf84518da2204b3. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/977128a1-60d5-451d-b947-56b57d209701.json and https://artists.proofprofile.net/proofs/artist/977128a1-60d5-451d-b947-56b57d209701.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).