A timar was a land grant by the sultans of the Ottoman Empire between the fourteenth and sixteenth centuries, with an annual tax revenue of less than 20,000 akçes. The revenues produced from the land
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 0x088b931567cf862093f95bbd9188bed17490446851d966455dca7a79f2ede7ef. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4afdd07c-663a-4e6b-8a19-5bd78dfd4b6e.json and https://artists.proofprofile.net/proofs/artist/4afdd07c-663a-4e6b-8a19-5bd78dfd4b6e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).