Esco or ESCO may refer to: Places Esco, Kentucky, an unincorporated community in the US Escó, a village in Spain Escos, a commune in France Organizations Energy service company or energy savings
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 0xbc2a3c62b92a7d5631f3f87e780661f7b8956b6aa17e4d48fa9b4f32ac8bb0ea. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98456b95-ae99-40b3-a774-599724ac010d.json and https://artists.proofprofile.net/proofs/artist/98456b95-ae99-40b3-a774-599724ac010d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).