Dewi Sartika (4 December 188411 September 1947) was an advocate for and pioneer of education for women in Indonesia. She founded the first school for women in the Dutch East Indies. She was honoured a
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 0x2a4eea24868e350356194ee47ed49b18d5e8aa99985221f5ebcaadf828cc4853. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8f30a9a-b6e9-414b-b518-3c7e279ef2e6.json and https://artists.proofprofile.net/proofs/artist/a8f30a9a-b6e9-414b-b518-3c7e279ef2e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).