The Penny Black Remedy is a London-based band playing a mix of country, ska, folk and punk. The band’s name refers to a pub in Edinburgh called The Penny Black, which opened at the unusually early tim
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 0xc76ebd397b01757274870bc3563bdfca7c2259862f1df952e35223ecb95bbce1. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abab460d-a3bf-4d80-90fe-b823d2245728.json and https://artists.proofprofile.net/proofs/artist/abab460d-a3bf-4d80-90fe-b823d2245728.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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