Grew is a surname. Notable people with the surname include: Dessie Grew (died 1990), INLA and Provisional IRA volunteer Seamus Grew (died 1982, INLA volunteer Henry Grew (1781–1862), English-born Chr
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 0x82268a4d30b321708f4b2a21ef9ae241e819e649c24ef11ac05cc17f551a67cc. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89f6c831-6cc8-4fad-9cb7-265cd17dc288.json and https://artists.proofprofile.net/proofs/artist/89f6c831-6cc8-4fad-9cb7-265cd17dc288.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).