thumb|Baby hatch in Germany thumb|Baby hatch called "BabyBox" in the Czech Republic thumb|Baby hatch in Poland. The label means 'Window of Life' A baby hatch or baby box is a place where people (typi
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 0x7b2f141e99b50362a24c5819d399e167135a8ca28b3424d672193d09681db81c. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a77b71e-eac5-48c7-8014-3443ae191a85.json and https://artists.proofprofile.net/proofs/artist/1a77b71e-eac5-48c7-8014-3443ae191a85.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).