Hamelin ( ; ) is a town on the river Weser in Lower Saxony, Germany. It is the capital of the district of Hameln-Pyrmont and has a population of roughly 57,000. Hamelin is best known for the tale of
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 0x24979202755d3a29259565302f8d16b3061f2c68eb20f8728abb289e9d38fec6. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7f0551f-34a0-430d-80b5-d163f80f4da7.json and https://artists.proofprofile.net/proofs/artist/f7f0551f-34a0-430d-80b5-d163f80f4da7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).