Sturm (German for storm) may refer to: People Sturm (surname), surname (includes a list) Saint Sturm (c. 705–779), 8th-century monk Food Federweisser, known as Sturm in Austria, wine in the ferme
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 0x42b94827d8b02583f10ac6a9714d6a692799a81b34b668734964227666ccc5a9. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d53c2d69-7bbc-43b4-9491-f71a791f8665.json and https://artists.proofprofile.net/proofs/artist/d53c2d69-7bbc-43b4-9491-f71a791f8665.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).