Iris Williams (20 April 1946 – 11 July 2025) was a Welsh singer. Williams reached the peak of her popularity during the 1980s. Early life and education Williams was born in Rhydyfelin on 20 April 194
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 0x055e8fc0a5e3d7698118c4f414556805bdb26b2505bc385fde3f2bbc058f3079. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b973cfc9-c1db-461e-9c85-5aad895219c9.json and https://artists.proofprofile.net/proofs/artist/b973cfc9-c1db-461e-9c85-5aad895219c9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).