Loppi (; , also ) is a municipality in Finland. It is part of the Kanta-Häme region, located about 50 kilometers (about 30 miles) south of the city of Hämeenlinna. Loppi was founded in 1632. The munic
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 0x31cdc59519e5075b17171a4ff10b1a61086eb77b9f3a0198a930d3fcf6eb10dd. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb088e7d-24e9-4675-9868-23e35c6bc01b.json and https://artists.proofprofile.net/proofs/artist/fb088e7d-24e9-4675-9868-23e35c6bc01b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).