Roberto Orlando Bracone Macceialli (3 August 1943 – 19 December 2021), better known as Elio Roca was an Argentine singer. Roca was born in Presidencia Roque Sáenz Peña, Chaco Province, Argentina on
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 0x72a7934344434554f34293c8fe04d21a69f283d1cc81e92ea4dba90c37fa6f73. 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/41ff4f14-f48d-466d-aabe-7a462dcce124.json and https://artists.proofprofile.net/proofs/artist/41ff4f14-f48d-466d-aabe-7a462dcce124.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 0xf194b99dfc73eade2a30f2535944a59a8b8ff309104df6af2ac48397f88ba2ec. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6N21993733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6c442e0c90acbfd36f131d616a2bd5a85d579bed074f8d6f5462de91cf7f1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6N21993735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1e83b0f5de05ea3b74a9e3f67dd43969caf2add3dcffd1fe1bb02aeb9ad7c4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QM6N21993738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c57c1487a69ffdf4d1de966bf055a60289e999766f26e32aacf578891760f6. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QM4TX2053649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7123178a4af878049d811090a3d9b43edf9215f1d5033b63b9f89c61fddf5c01. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TX2053652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb35b683720d243f1f89600cc6d265702613774cd7bc2383b149ec3cd28dbc50. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QM6P41948556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787b3b5620d55a03eb3e100a6a50d67a06562ff9f954ff4a5d61217e17ae88a7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6P41948559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638a78204d94d42342e1c488bf0293f13f4880bf7289c65aaa8c002ea89d7df7. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QM6P41948560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e85caae56be637003dea62834be1bdfcb7af153c8e884de084a6540f9524b60. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM6P41948562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524bd4a35658a9299e947b53c64a42c01d2f1edcd22e31ccff9981b0959c74e0. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/QM4TX2053123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173e4269893b47d972a42b9f7e79e86a1431f21bc384a6862224486c8d3bfa82. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM4TX2053125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d8f5f30393c673f39631bf0f58e54fdcdd043fd39e7c7ca1c56572916b534e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/USZZR1202016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ead320af46ce11f2523382658d017717a20f9715607b6f229c174fff3e26f8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/USZZR1202020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1b65e6a5d8a80d794d5a4d5c964bd777a870e8580fcac0ed48492a729963f0. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/USZZR1202021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cb24ea9a24dca44b49e9c5077eafc145fde9190e74991003e7985aabd4a16a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ART720710629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496b392fe2543e5f4673dcb5b30191f64251fdf937940441c9d23d1687e2ed8e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ART720710631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35bc42b40c6c8cca2ea09011d9738592b2713da1f38c4a0d6cf3f45eeeea65a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ART720710632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9079b84018ff7ff4b7700bb11cf6ea3539a7a1e4a0a777b5f25138d9292f9b82. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ART720710634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7588bbd58828481fc17229cb7594f92e401a1c666fb4b7ab1c2dfec3f92d5a34. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ART720710637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0911d21d3ebe9b595add666c2411596cb6e7daeaab79842cfa9cceb1767a2a1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM6N21424649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa528cd6d775a72afd90f36d196b7286f443a2719fec1b8f88f6a069f770ffe9e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/COF010701362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669a78107d9f42966799198cf65c0c0ba065fdcebcd6305445b90209052b3191. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/COF010701363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495ded5d223db695ac8c9c99acc1c2cc3b0cd2861c67b57e070dea440d272c26. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMBZ91611832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394d26cb314f6fc67f85746d732d8a9c20d11d27faacc0a5ba7cfa68dfbb14bd. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/QMBZ91611834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb1f45cd054d5012232b4fabca669f7223f674f2bc99fb721b471c65391b1b1. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QMBZ91611839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84467e1c8ba88acaf398d78eeca01463940e16903424d25f00b0097578ce037f. 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/COVM11623259.