Guadarrama is a town and municipality in the Cuenca del Guadarrama comarca, in the Community of Madrid, Spain. Its population is 17,063 according to the Continuous Register of 2023; the population sw
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 0x100c6a420240b9a30e12bc8d23861635db11adcdc5ec8c8ea7c6c4b500113e25. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9576647-9423-436a-9394-c00c317f0f63.json and https://artists.proofprofile.net/proofs/artist/d9576647-9423-436a-9394-c00c317f0f63.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).