Debt, AIDS, Trade, Africa (DATA) was a multinational non-governmental organization founded in January 2002 in London by U2's lead vocalist, Bono, with Bobby Shriver and activists from the Jubilee 2000
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 0xb35de02ba6ee20305d0df0e177182f0ac1bd7360c41006c16f9d8951f1e0caec. Chain 2 (Bitcoin): anchored in block 954008 (2026-06-16T21:31:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3319ca2c-19e8-4f09-ad4b-9425bf941bb4.json and https://artists.proofprofile.net/proofs/artist/3319ca2c-19e8-4f09-ad4b-9425bf941bb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).