thumb|Kai Meyer Kai Meyer (born 23 July 1969 in Lübeck) is a German speculative fiction writer. He has won multiple awards for his work including the 2013 and 2015 Seraph Award for Speculative Fiction
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 0xdbf1a4278a233761f6c0e3fbb609619bddf9db687a383efbc015a3e5cc0391ee. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93749d93-1c31-4482-b228-576f542a8bd4.json and https://artists.proofprofile.net/proofs/artist/93749d93-1c31-4482-b228-576f542a8bd4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kalvarienberg [Das Böse vor deiner Tür, Band 16 (ungekürzt)]