"Desiderata" (Latin: 'things desired') is a 1927 prose poem by the American writer Max Ehrmann. The text was widely distributed in poster form in the 1960s and 1970s. History Max Ehrmann of Terre Hau
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 0x64fc541caec714bc694912ed122e45972f6bc6f513c5419c1db0c28cd35b6b41. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a41bf98c-4972-44a2-9ee5-dc5e5de7b0dc.json and https://artists.proofprofile.net/proofs/artist/a41bf98c-4972-44a2-9ee5-dc5e5de7b0dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).