Coroico is a town in Nor Yungas Province, in the La Paz Department of western Bolivia. History Coroico Viejo (Old Coroico) was founded above the river Quri Wayq'u (Quechua quri gold, wayq'u valley,
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 0x468fe96c045e642cc77dc5595f8635395523f5d22b86293a3add7f0e87d7eb4c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c1e3fc7-8c3b-4344-a179-073d5027615b.json and https://artists.proofprofile.net/proofs/artist/3c1e3fc7-8c3b-4344-a179-073d5027615b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).