Nicolas Saboly (, ; 30 January 1614 – 26 July 1675) was a poet, composer and choirmaster from what was then part of the Papal States. He composed many Christmas carols in Provençal Occitan which form
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 0x70a52ff54e9f1f8b2a481ebf4ab6816b31b6fd7652103db6821329b0dce3e99f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6392eb3b-268f-40ea-8122-05eb7fd474b0.json and https://artists.proofprofile.net/proofs/artist/6392eb3b-268f-40ea-8122-05eb7fd474b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).