The Green Arrows were a Zimbabwean band founded by brothers Zexie and Stanley Manatsa in 1966. They became the first Zimbabwean band to record an LP in 1976 with their debut Chipo Chiroorwa, and were
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 0xd0d3d7d2c0f65f408a4b7ea2a442beaed1ded867a0c0ad14e6f8321cc51d7b64. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8425b70f-edc8-4350-b6eb-246a85402208.json and https://artists.proofprofile.net/proofs/artist/8425b70f-edc8-4350-b6eb-246a85402208.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
4-Track Recording Session (Analog Africa No. 1)