ERO or Ero may refer to: Science and technology Easily Recoverable Object, a subclass of near-Earth object that is easily recoverable Early Release Observations, of the James Webb Space Telescope
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 0xb0125e0322dc19d1fdb28ccce14a87d0be0c77fcc5a9959963b8ad9a72b4b41e. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2c69729-34ef-4143-b78d-1f105d8ae1c3.json and https://artists.proofprofile.net/proofs/artist/e2c69729-34ef-4143-b78d-1f105d8ae1c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).