Esche may refer to: People Annemarie Esche (1925–2018), German scholar of Burmese literature Charles Esche (born 1963), English museum curator Eberhard Esche (1933–2006), German actor Robert Esch
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 0xe47093b6aa78d92d58f63ef0e780063ba9ac6f758113d578d15004ff9b6db6ba. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87e8882d-bedd-4d99-8710-e67681f7db61.json and https://artists.proofprofile.net/proofs/artist/87e8882d-bedd-4d99-8710-e67681f7db61.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).