Carlos Soler Barragán (born 2 January 1997) is a Spanish professional footballer who plays as a midfielder for La Liga club Real Sociedad and the Spain national team. Soler began his professional car
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 0xe7772a85d6c2a4c8f0a5709848a824d94d3f7e09d1f48cb01d66e1e08831b302. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/549ae41e-06ba-45ae-a044-bdb993f6bd43.json and https://artists.proofprofile.net/proofs/artist/549ae41e-06ba-45ae-a044-bdb993f6bd43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).