Stem, stem, or STEM commonly refers to: Plant stem, a structural axis of a vascular plant STEM, an acronym for science, technology, engineering, and mathematics Stem, stem, or STEM can also refer
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 0x74218fc3a6c31cde53d94e685ed374c89dcac10e80d84323a5025617a00e4b49. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1957a9e9-f5b1-4852-b37e-a0150e3c8c99.json and https://artists.proofprofile.net/proofs/artist/1957a9e9-f5b1-4852-b37e-a0150e3c8c99.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).