Semeria may refer to: Semeria River (or Benedec River), a tributary of the Olt River in Romania Giovanni Semeria (1867–1931), Italian orator-preacher and author
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 0x24b3757393319402e29551f6c1645448f70c28d6f5074fc1b37cec334f6f4898. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3d85464-8c55-4584-8f66-f7f92a2b04f4.json and https://artists.proofprofile.net/proofs/artist/c3d85464-8c55-4584-8f66-f7f92a2b04f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).