right|250px|thumb|Rifu town hall is a town located in Miyagi Prefecture, Japan. , the town had an estimated population of 36,014, and a population density of 800 persons per km2 in 13,568 households
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 0x25807f5e2cc3eed681c6d98c8c0801b3c0d05d1c4bcc9f912e442b3ed14c1c0c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e903429-1dc9-460f-907e-ba9c7b05044e.json and https://artists.proofprofile.net/proofs/artist/8e903429-1dc9-460f-907e-ba9c7b05044e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Revolutionary tango [the slavery dance] (Original)