The Zamzam Well is a well in the Masjid al-Haram in Mecca, Saudi Arabia. Zamzam or Zam Zam may also refer to: Zamzam (given name) Zamzam (soft drink), a soft drink produced in Iran Zamzam (party)
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 0x965f1fcecef9a167c0e12ea75c9e891ced4a30b8089c165121b52acd62c72787. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4727536d-575c-4c61-87bc-35c689fdb522.json and https://artists.proofprofile.net/proofs/artist/4727536d-575c-4c61-87bc-35c689fdb522.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).