Carlos Manuel Ribeiro Freitas (born 20 January 1994) is a Portuguese professional footballer who plays as a right-back for Campeonato de Portugal club O Elvas. Football career On 31 July 2016, Freita
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ae78e4fbce5497ca0d351703280c64704da7716c4e9cd1b7559301f58b1843. Chain 2 (Bitcoin): anchored in block 953886 (2026-06-16T04:37:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b015314-ebae-43cc-a8f1-eeabd3216653.json and https://artists.proofprofile.net/proofs/artist/0b015314-ebae-43cc-a8f1-eeabd3216653.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).