Roberto Diana (born 21 February 1983) is an Italian musician, guitarist, composer, producer and session man. Biography He was born in Luras, Sardinia, Italy. He started to play guitar at the age of 1
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 0x8412c9a493fcccee3d09e0c8dfcfc780238922a6d85adb86ef70ff863ea10ca4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24af2807-6928-43c0-9aa5-4541aa6974ca.json and https://artists.proofprofile.net/proofs/artist/24af2807-6928-43c0-9aa5-4541aa6974ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x826139111e0e647a4e99a87ba1ab4c81b22654dc5721a440b9803b85886f0052. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:26:52Z), 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/ITZN91200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5365263d7c51331e6d21c7c6ca8a828fc8d369241f2f1193c920a81029fe847. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITZN91200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbdc5911d7ddb76ec9e0677cc593f3d3d6a6862eec4d8216796a71e66dacf4f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ITZN91200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb731d67301c552385268af1c85d619672264229a349c56bd306fd27b113cd55. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82098680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ad814bd1c7dc39de0699b82cf22d53d933ddc339ce25f009e636737b607fcd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82098681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a90a866eba1295ba5ad3e7af5a979f0bdc13b4a2cb774f05e8386521506304. 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/QZDA82098682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925113da9869e591f56c0aee0620decb928c9b63532dc364df96d61b36d68866. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82098683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85716ada9cb410c2f7396b7a576d97912415e55581db1da14c9e2ae0b7a617e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82098684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74143f28c1f313b217ea061a12c5384e83cb7cf04d1df92967fbd6572776dcae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82098685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a023682be2225193b9df7231ca7f1608e8e77bf6dbafc6bf398ea80aa3caf30. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82098686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572389ebe47ff74f94df1d26f8d7ecab727064c04d62597b54c7982a350c0bf0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82098687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a69ecdcb7161b3ab2e1b7c0fca390764703c04d72a8a467e6dac005ee7d7c9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82098688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e63a8b31fa2c83731c73ebc972cd1c1e06ea3a0096b109ac96d5b68875d65d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITZN91200008.