eSobi is an integrated desktop-based information management tool and a standalone news aggregator delivered with worldwide Acer computers. eSobi is a shareware application and the full version of eSob
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 0x1ac706f711b03dd12223f94503b19b5bade21aa153d93812ee7fe92ff64d7d08. Chain 2 (Bitcoin): anchored in block 954063 (2026-06-17T07:49:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47dbc973-afe3-4a8c-ba3a-39a967b59f0d.json and https://artists.proofprofile.net/proofs/artist/47dbc973-afe3-4a8c-ba3a-39a967b59f0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).