Established in 1905 in Kobe, Hyogo prefecture, DONQ Boulangerie is a French-style bakery chain which has expanded to over 140 outlets across Asia like: Singapore, Taiwan, Hong Kong, China (run by fran
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 0x71d58f3c17d5006b0cba81c0f585bbed43846af5122f13cb47e8741612c923f0. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1264b63-5729-43cd-b932-b216e161aad5.json and https://artists.proofprofile.net/proofs/artist/e1264b63-5729-43cd-b932-b216e161aad5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).