Zamarra is a municipality in the province of Salamanca, western Spain, part of the autonomous community of Castile-Leon. It is located 100 kilometres from the city of Salamanca and as of 2016 has a p
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 0x6efaba29499435641aec727b332a2eedb8f46dfbff43dbeb1a5676892fbd46bb. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd997788-7de6-4b8b-b561-82161f7db20d.json and https://artists.proofprofile.net/proofs/artist/fd997788-7de6-4b8b-b561-82161f7db20d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).