Ollen is a long river of Lower Saxony, Germany. It discharges into the Hunte through an old branch of the Hunte near Berne. See also List of rivers of Lower Saxony Category:Rivers of Lower Saxony C
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d24243bc7598b051c2c4858634874f0cddd908cd1a325a507b75ccea10a5b9. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c89a4bb-3e51-4107-874e-a17c609c20ed.json and https://artists.proofprofile.net/proofs/artist/2c89a4bb-3e51-4107-874e-a17c609c20ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).