thumb|Pier Miranda Ferraro (photo with 1957 dedication) Pier Miranda Ferraro (30 October 1924 – 18 January 2008) was an Italian operatic tenor who had an active international opera career from 1951 th
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 0x9e3a613a94a13f0c39ee2eeb0697d8e98d028fa78b89c82fa272ca3b1dd222db. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6173008-c591-4d27-87a2-225dbe4ca583.json and https://artists.proofprofile.net/proofs/artist/b6173008-c591-4d27-87a2-225dbe4ca583.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bellini: Il Pirata, Act 1: "Ah! partiamo, i miei tormenti" (Gualtiero, Ernesto, Imogene, Itulbo, Solitario, Chorus) [Live]
Bellini: Il pirata (1959 - New York) - Callas Live Remastered
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad1e9f0ab85cd02e811e5847aab9623a487065a5b85f5d83dee4fdad5a8a24a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1701011.