Petersen is a common Danish patronymic surname, meaning "son of Peter". There are other spellings. Petersen may refer to: People In arts and entertainment Adolf Dahm-Petersen, Norwegian voice speci
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 0xcd46379583697d2a2ea3bde0f1c3107009e8eb8fec591156fe5667706be2e12e. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c491021d-5d63-4636-817c-27bcb5939b81.json and https://artists.proofprofile.net/proofs/artist/c491021d-5d63-4636-817c-27bcb5939b81.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Ladegast-Orgel im Dom zu Schwerin (Petersen, Winfried)