Sirsy (stylized as SIRSY) is an American rock duo from Albany, New York consisting of husband and wife Melanie Krahmer (vocals, drums, piano, melodica, flute) and Rich Libutti (guitar, bass). During t
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 0x58eb1db0c0df01bdfed23715cf47ec15bfa72eb1ecda108c78df1b77b06fe34f. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8455761-4291-4bf3-bcfd-09437cd907d0.json and https://artists.proofprofile.net/proofs/artist/e8455761-4291-4bf3-bcfd-09437cd907d0.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.