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 0x8f60c28d8f7100101e7577e07aaaf9818fbc09627038a80f2afe1f0e3dc7232e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74ae1294-1111-4d75-b289-9ea4f86c6cc3.json and https://artists.proofprofile.net/proofs/artist/74ae1294-1111-4d75-b289-9ea4f86c6cc3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sturm. (Segler über ihre dramatischsten Stunden.)
Am Berg. (Bergretter über ihre dramatischsten Stunden.)
Von der Kunst, langsam übers Meer zu reisen. Einmal München - Antalya, bitte.
Der Einsatz meines Lebens (Bergretter erzählen)
Revier-Kompass Kroatien Nord (Insiderwissen für deinen Traumtörn zwischen Koper und Kornaten)
Das Rätsel der Orcas (Wie Orcas sich das Meer zurückholen. Warum sie Boote angreifen.)