Matri may refer to: Matri (mountain), in the Himalayas Matri (biblical figure), ancestor of Saul, the first King of Israel Alessandro Matri (born 19 August 1984), Italian footballer Matri (brand), an
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 0xce6eb16d6bb705b80a2cd4a9399941e18be1f7dc301cc10ffde9c8685e0caf14. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bc74229-3dfc-4fff-b10d-b2e8d02e8c09.json and https://artists.proofprofile.net/proofs/artist/9bc74229-3dfc-4fff-b10d-b2e8d02e8c09.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).