La Marea is one of 24 parishes (administrative divisions) in Piloña, a municipality within the province and autonomous community of Asturias, in northern Spain. The population is 55 people. (INE 2011
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 0xcb94a1f6574fff8bf1e3873f8ce6bdc78f7ad5f36cc15f0e8459a7678a27cea1. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba2e35aa-fc46-41e8-90af-2ce859ff86a9.json and https://artists.proofprofile.net/proofs/artist/ba2e35aa-fc46-41e8-90af-2ce859ff86a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).