Mari may refer to: Places Mari, Syria, an ancient Semitic city-state Mari, Paraíba, Brazil, a city Mari, Cyprus, a village Mari, Greece, a village, site of Marius, an ancient Greek town Mari, Iran (d
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 0x9d7d0a97c49ea9d05a0f2ba2010b8c48824a550ba6e420f71417c9319578637e. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03432986-207d-4f5c-ac80-716bc80c17c3.json and https://artists.proofprofile.net/proofs/artist/03432986-207d-4f5c-ac80-716bc80c17c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).