thumb|Satellite imagery of Turtle Island (North America) "Turtle Island" is a name used by some Indigenous peoples of the Americas to refer to Earth or North America. It is also commonly used among bo
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 0x0769f346ccd0a52915c6f95d91125ec8aa6dcba5cad12aa0907dc37920cf7ddf. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/991ecf23-415b-4c57-82c7-c8fb867acec9.json and https://artists.proofprofile.net/proofs/artist/991ecf23-415b-4c57-82c7-c8fb867acec9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).