Slim or SLIM may refer to: People Viscount Slim, a title in the Peerage of the United Kingdom Slim (name), a list of people with either the given name or surname Slim (nickname), a list of people
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 0x0147cc440beed31b41f39d2d194ed5c195c7583ac6b857b7a6cc80821a1b7924. 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/2a943183-ff18-453a-956f-9fd4d441e5b9.json and https://artists.proofprofile.net/proofs/artist/2a943183-ff18-453a-956f-9fd4d441e5b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).