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 0x41146b2bc3f297ecba876afa1ab1e55724fb038caf9e68ef19c1f4e5463ffb6c. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4c0eaef-3c73-4ebd-a62f-935f9c5a5dd6.json and https://artists.proofprofile.net/proofs/artist/b4c0eaef-3c73-4ebd-a62f-935f9c5a5dd6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sabotage und psychologische Kriegsführung. Ein kleines Handbuch "Simple Sabotage Field Manual" von 1944. Vollständige Deutsche Ausgabe (ungekürzt)
Sabotage und psychologische Kriegsführung. Ein kleines Handbuch "Simple Sabotage Field Manual" von 1944. Vollständige Deutsche Ausgabe