Toobs (later known as "Tasty Toobs") are a brand of Australian snack food, first created in 1954 by Albert Cranum, and owned and sold by the British Australian company The Smith's Snackfood Company, t
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 0x3cd77bc8db529c5f36c81fcecf22298119a17f85b982310c635dd314575d63ad. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2afd8dad-93de-4f66-a51c-e03526ea98e5.json and https://artists.proofprofile.net/proofs/artist/2afd8dad-93de-4f66-a51c-e03526ea98e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).