PPM may refer to: Business in general Planned preventive maintenance Project portfolio management Public performance measure, UK measure of rail punctuality Organizations Malaysian Scouts Associ
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 0x70a16e3d4379a61f79ac113c9dbe3e67a7def8bf2a69c278d7546a8fb16aa2f6. 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/f9f1fd9b-59b0-4dac-a35b-d2dbdcb9be51.json and https://artists.proofprofile.net/proofs/artist/f9f1fd9b-59b0-4dac-a35b-d2dbdcb9be51.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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