Yesod (Hebrew: יְסוֹד Yəsōḏ, Tiberian: Yăsōḏ, "foundation") is a sephirah or node in the kabbalistic Tree of Life, a system of Jewish philosophy. Yesod, located near the base of the Tree, is the sephi
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 0xac990a3bd9cab58473e6a8ea84d469d667717360c2f5f802c0365b8eea0c52e4. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad55ee22-cd94-4012-aefc-3347b6eea3fc.json and https://artists.proofprofile.net/proofs/artist/ad55ee22-cd94-4012-aefc-3347b6eea3fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).