Tugu may refer to: National Monument (Malaysia) or Tugu Negara, a monument in Kuala Lumpur, Malaysia Tugu Yogyakarta, a monument in Yogyakarta, Indonesia Tugu Muda, a monument in Semarang, Indonesi
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 0x58067e0c18dd72b4f13329a20ade64a7997419bada5aa72228620173f96cacc7. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e0e578f-0767-4676-9f99-1f6d0691f430.json and https://artists.proofprofile.net/proofs/artist/1e0e578f-0767-4676-9f99-1f6d0691f430.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).