Arévalo is a municipality of Spain belonging to the province of Ávila in the autonomous community of Castile and León. Lying on the northern Meseta at the confluence of the Adaja and the rivers, it i
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 0x91ba5051fb0dd3617ec5c3b4ab78994fc6f776baf30fd451ebfc4acd398f21ce. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/320f2a45-16aa-4b8f-9103-c9ea13002689.json and https://artists.proofprofile.net/proofs/artist/320f2a45-16aa-4b8f-9103-c9ea13002689.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).