Akça is a Turkish island shaped like a shellfish near the biggest city of the Turkish Aegean coast İzmir. It is an uninhabited island and there are only bushes on the island. It is situated between Ar
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 0xdbc61f29bd086e1b24fc3fe26764cc3d807d06ad7b0fa83ced0ea884a6c9cb90. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed9621f9-bdac-45bd-91a3-c6d42f74867b.json and https://artists.proofprofile.net/proofs/artist/ed9621f9-bdac-45bd-91a3-c6d42f74867b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).