thumb|Zion (1903), Ephraim Moses Lilien Zion (; ) is a placename in the Tanakh, often used as a synonym for Jerusalem as well as for the Land of Israel as a whole. The name is found in 2 Samuel (),
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 0x6d03e2347b14abf808e4f9b5cdf841b579abf6e978131ac972758e7f0d11170d. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c19109ca-fb4b-41c6-9b92-ca3f8edccd8c.json and https://artists.proofprofile.net/proofs/artist/c19109ca-fb4b-41c6-9b92-ca3f8edccd8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).