Seman, Semans or SEMAN may refer to: Seman River in Albania Seman, Alabama, a populated place in the United States Seman, Iran, a village Semans, Saskatchewan, a village in Canada People with t
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 0xc7c4692d56c21ec4ccaa604768add4975255b256edc12117c1b0fa1ddb8e53d5. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dc887fb-eafa-416f-af2e-9e435c3279a7.json and https://artists.proofprofile.net/proofs/artist/0dc887fb-eafa-416f-af2e-9e435c3279a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).