In Greek mythology, Marse (Ancient Greek: Μάρση) was a Thespian princess as one of the 50 daughters of King Thespius and Megamede, daughter of ArneusApollodorus, 2.4.10; Tzetzes, Chiliades 2.222 (or b
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 0xe340b939add37414fcb96a90102737a5604cfef544cae6a859f8c4ef2c40b72c. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd11dd8e-fa54-4254-b501-ddd5e035e714.json and https://artists.proofprofile.net/proofs/artist/bd11dd8e-fa54-4254-b501-ddd5e035e714.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).