Solidão is a city in the state of Pernambuco, Brazil. The population in 2020 was 6,021 inhabitants according to the IBGE, and the total area is .IBGE 2020 Geography State - Pernambuco Region - Se
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 0xb2c531a2280af46c107ade91788536d14fbc5714eecb7e04db90556ad6648943. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71b67795-d93b-48f1-97be-6018c205973c.json and https://artists.proofprofile.net/proofs/artist/71b67795-d93b-48f1-97be-6018c205973c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).