Maison (French for "house") may refer to: People Edna Maison (1892–1946), American silent-film actress Jérémy Maison (born 1993), French cyclist Leonard Maison, New York state senator 1834–1837 N
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fc6e6dfa7f8ec1bbb136528dbdfaa5d3052a6344b9b81020c6dd7979164a41. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c18733e6-cbca-4875-801e-7dbf0f7961b7.json and https://artists.proofprofile.net/proofs/artist/c18733e6-cbca-4875-801e-7dbf0f7961b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).