Sero may refer to: Places Sero, Ethiopia, a village in Tigray Region, Ethiopia Sero, Iran, a city in West Azerbaijan Province, Iran Sero, Mali, a town in Sero Diamanou, Mali Sero Blanco, a town on th
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 0xb6e49de75a24b50c8d582bb858c7f2b34c4f09ba38e46eef85b5b8209bdb5849. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51706a7c-6844-4291-bb60-62e8efe3b621.json and https://artists.proofprofile.net/proofs/artist/51706a7c-6844-4291-bb60-62e8efe3b621.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).