thumb|200px|Water Nymph Salmacis, engraving by Philip Galle (1587) Salmacis () was an atypical Naiad nymph of Greek mythology. She rejected the ways of the virginal Greek goddess Artemis in favour of
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 0x050e4e13f0be1508fe6c55e59236c051d31e2689e8dace643fa765ccf7fd4496. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1215b755-c47c-40a9-8800-6c2271e5eaf5.json and https://artists.proofprofile.net/proofs/artist/1215b755-c47c-40a9-8800-6c2271e5eaf5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).