Maison Dieu (French for "House of God"), plural Maisons Dieu, referred to a type of hospital or almshouse. Examples include: Maison Dieu, Dover Maison Dieu, Faversham Maison Dieu, (Singleton, New
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 0xeb029b7abaf9f207e6f8111c5a0a9ca4203e1e0c930c6eadd9330c57adf54de4. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b19c8c93-d350-4199-a54f-ddadfe089822.json and https://artists.proofprofile.net/proofs/artist/b19c8c93-d350-4199-a54f-ddadfe089822.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).