300px|thumb|Cristian Carrara Cristian Carrara (born January 28, 1977) is an Italian composer who is active in the Italian social and institutional scene. Early life Born in Pordenone, Carrara gradu
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 0xa03632ec079b089b274a4911ecf73926376bbc9bca5b716dc8be86bba6be8c0b. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f32bf3f6-51a6-46c7-a724-2c4709a72d6c.json and https://artists.proofprofile.net/proofs/artist/f32bf3f6-51a6-46c7-a724-2c4709a72d6c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carrara: Magnificat, ondanomala, suite per bicicletta e orchestra
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 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 0xf9a1a0046e9307d800cac2cd7574fc6072b5ffda1029f9280428a8dbfbc8ac6f. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/GBAJY2445814.
Cristian Carrara: Voci da Hebron (Live at Teatro Comunale Pavarotti-Freni di Modena, Italy, 2/18/2024)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282e39308cc0d3648e9e72373080cbc48458ad3298ec29e8e244841718d038ae. 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/HKI192413809.
War Silence - Rare Italian Piano Concertos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975b08340774408e1eab8a38fbe8306fef74d9639a5848e5addcc206773e6b06. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBAJY2445812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50165a53393842d0b6b2690f65b2554cc0d8cf86b3ff3d2d5112ea4dbab79f97. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAJY2445813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a1a0046e9307d800cac2cd7574fc6072b5ffda1029f9280428a8dbfbc8ac6f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAJY2445814.