Peter Baumgartner may refer to: Peter Baumgartner (cinematographer) (1939–2021), Swiss cinematographer Peter Baumgartner (footballer), Swiss former footballer Peter Baumgartner (ice hockey) (born
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 0xd12fdf3cda06e80fa76128cc79f3889eaa3f8b733e809402134e2852ab1e25ca. 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/17fe56c6-729d-4fe8-8995-431b3c60f6b7.json and https://artists.proofprofile.net/proofs/artist/17fe56c6-729d-4fe8-8995-431b3c60f6b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).