Friedemann is a German given name meaning "peace man". Wilhelm Friedemann Bach, German composer and eldest son of Johann Sebastian Bach Friedemann Friese, a German board game designer Friedemann Sc
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 0x93db2b84525d2621582a948c9d3b6cf340dfd252a84b74c400472103f4a00362. Chain 2 (Bitcoin): anchored in block 953851 (2026-06-15T23:06:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01f6aba4-a068-4559-9c4d-e33daf201109.json and https://artists.proofprofile.net/proofs/artist/01f6aba4-a068-4559-9c4d-e33daf201109.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.