Arturo Testa (15 August 1932 - 12 May 2021) was an Italian baritone and pop singer, mainly successful between the 1950s and the 1970s. Life and career Born in Milan, a passionate about opera sin
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 0x9112c80dd922031fad2cc5e20882180de27b82b9c6175aa598133a699a3eed86. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d200a1ee-7b41-4383-ae98-13ad3ed9fb01.json and https://artists.proofprofile.net/proofs/artist/d200a1ee-7b41-4383-ae98-13ad3ed9fb01.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage Italian Song Nº 36 - EPs Collectors, "Festival San Remo 1959"
Festival de San Remo 1960 (feat. Piero Soffici et son orchestre) [Mono Version]
Febbre di musica (Festival di Sanremo 1961)
100 Hits Storiche Del Festival Di Sanremo (Dj Onofri Presents)
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 0x1c918ad2c471a6bf75c174a64b92b781c8126cd487d40fe364c6a2938e1dcfcd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6V80090033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb791c914ed148fcb11d72a3ce035c4cdced02cdaf1d6a6e65e7ba135d277e095. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6V80394275.