Touchstone may refer to: Touchstone (assaying tool), a stone used to identify precious metals Touchstone (metaphor), a means of assaying relative merits of a concept Entertainment Literature Th
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec6a29120af6580b61a305aa626b25f991444df105bcf13409b33a50d5edde0. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2fdfb05-90c3-405b-9d85-3594b0bc07ff.json and https://artists.proofprofile.net/proofs/artist/a2fdfb05-90c3-405b-9d85-3594b0bc07ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).