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 0xd3f60b5af81fff9ae6c74c3178e54dc9ba3bdb059e41d6bbc460f6b7e27eaf81. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d218daa2-1c3d-4591-9d95-b20d53de3733.json and https://artists.proofprofile.net/proofs/artist/d218daa2-1c3d-4591-9d95-b20d53de3733.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Systemische Beratung Handbuch: Mit der einfachen 5-Schritte-Formel der Systemtheorie Konflikte erkennen, lösen, vorbeugen und Beziehungen systematisch verbessern - in Familie, Partnerschaft & Beruf