thumb|Reconstruction of a Neolithic farmstead, Irish National Heritage Park. The Neolithic saw the invention of agriculture. The Neolithic or New Stone Age (from Greek 'new' and 'stone') is an ar
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 0xe17f61d5637caef6d0d7f93f339b2d3a9700a5875123c9273695b5ac40c0bbda. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7f9f97d-92d0-43bd-ad64-949ce7cd8e0c.json and https://artists.proofprofile.net/proofs/artist/b7f9f97d-92d0-43bd-ad64-949ce7cd8e0c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).