Subtara () is an archaeological site in the Sdot Dan Regional Council, near the moshav of Yagel in Israel's Central District. History The site has been inhabited since ancient times, and its name i
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ea3db289f54b598061f4c1dfaebb61e1b95f37494c59396cb3294b9000e500. 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/de95206b-7dc0-4d6d-95c7-8abb0870194b.json and https://artists.proofprofile.net/proofs/artist/de95206b-7dc0-4d6d-95c7-8abb0870194b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).