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 0xde6001d6861c8cd59e2f44e05f4b1fa7721ca842fd526811437e8fb7f590566b. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccc1bc55-dffd-4f59-a848-20774765bbee.json and https://artists.proofprofile.net/proofs/artist/ccc1bc55-dffd-4f59-a848-20774765bbee.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Auszeit auf dem kleinen Archehof [Der Archehof zum Glück, Band 1 (Ungekürzt)]
Neuanfang auf dem kleinen Archehof [Der Archehof zum Glück, Band 2 (Ungekürzt)]