Arnon Yasha Yves Grünberg (; born 22 February 1971) is a Dutch writer of novels, essays, and columns, as well as a journalist. He published some of his work under the heteronym Marek van der Jagt. He
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 0x076e0ce25c78c8476b44b16eaad2f5aa9c1533c2bbb1003c53e84514d6b05d56. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a046bcfc-e193-4a8c-a2e9-0013dc8cd1e9.json and https://artists.proofprofile.net/proofs/artist/a046bcfc-e193-4a8c-a2e9-0013dc8cd1e9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Couchsurfen und andere Schlachten [Herausgegeben und mit einem Vorwort von Ilija Trojanow (Ungekürzt)]