Sal, SAL, or S.A.L. may refer to: Personal name Sal (name), a list of people and fictional characters with the given name or nickname Places Sal, Cape Verde, an island and municipality Sal, Iran,
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 0x29c3f9d8f029a569cde9010862a9a0c361d3d032ea909ef3a332284299aa4000. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7d953b4-1b6d-4a59-a84d-ac097c920474.json and https://artists.proofprofile.net/proofs/artist/c7d953b4-1b6d-4a59-a84d-ac097c920474.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).