TRAMO ("Time Series Regression with ARIMA Noise, Missing Observations and Outliers") (Gómez y Maravall, 1996) is a program for estimation, forecasting, and interpolation of regression models with miss
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac5a2b7e6ad91245258e600e1e9f58cc240fab3b159b4acd02adbef424098dd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8ebcabe-5143-434d-a776-c9b0609aefb9.json and https://artists.proofprofile.net/proofs/artist/e8ebcabe-5143-434d-a776-c9b0609aefb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).