Héctor Walter Giardino (born 6 March 1960) is an argentine guitarist and the leader of the heavy metal and hard rock band Rata Blanca. He is recognized as one of the best guitarists in the history of
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 0x77bca8fc8f7100a1ca20f7737f26620506e1e3446956b44898611ce7b1829f74. 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/4d0a8749-4b0c-428e-9c1f-a161f13117b2.json and https://artists.proofprofile.net/proofs/artist/4d0a8749-4b0c-428e-9c1f-a161f13117b2.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 0x37a1d5ec64096a38ee724e0866fbd9c7dc9eca047baed81492a63ed441525412. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARF099800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5337d9cba5752973cf1ba8f5bb7691d169f65516fd07fc08541cdfa773265ece. 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/ARF099800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2057055d1af2e70fce7fb8521587eb825a305ec898bfb1573f4f08acf6ece364. 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/ARF099800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5740efcb7ec24e4f718760c51a883114be8db1d654e546f748e65b9a2bcdbf9. 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/ARF099800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c837a40aaa5744b7d7bb3e1f308311721acf882aeb774f0cb53951eab9337c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF099800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f6c992c75204c6a5ab3686ba11c566649647cee5e101470505ed043ce95408. 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/ARF099800121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46b24d4e3eeb75cdba65ad5dc1925b43af75368c800c419369e0fdc305bb6a1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARF099800122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c63726e69195100142bd1e34b227c07b582e1dcb536af2c864c3c1d434e5b42. 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/ARF099800123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2f9753afd5814787e345058e2add253eb079a154cb92877f47ca5a489ce466. 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/ARF099800124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21650ef786bdb295b16c71128c36440d440d55f78538b5905837340798dc00bf. 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/ARF099800125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975816e34311a723604e9ca9173d729ee6e9db5a5467bbe1fea5933488dae55e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEH842300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5572b5a83add4296345000d9f7f63e57386f839ef5144bd63cea198723c4e31. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEH842300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aac0c04a0985dcb7c0f967ac21d4e875044734fc1da4341f9787277cdcee4f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH842300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d537c512c1b705b748476ce2e395fbc749d9c9f45c714a665eb4a2def2ee46. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEH842300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fc75f1b8bee9fd5ca50ed6dd0d660a692f3114e3f5d9e5a924a131fcb5eb67. 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/DEH842300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752136194d4a328225d6b07556b313556c78a7ddb42073552c1c4e16d3d449b6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH842100386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036a17294bd0fe7fccca6a29c7f052a87eb05327fe9d9e726a9f008a917c512d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH842100384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d3e1dada8ec01c84145556cfd10409e4c77d523e230907920621eef52b4845. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AR4C11800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a2a0fd63ef52878294eba4ff19fa238d0f0143d8d19bdf32b56bb0f7124594. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/AR4C11800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab08257fd24a128763333aa1ee40a3ed499d6e4b59a8b01490d04eceab9bc15. 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/AR4C11800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343223b0cb41b3083950670305ecc23c03c50f1f9bc267011a0dd3a8a947f4c9. 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/AR4C11800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab462e2086b87bcd5712e9ae8ea553ac370550219853a45bd57a67c7f343349. 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/AR4C11800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3166a2c80071bc64d622e63a97ec57a7f374111db3f9264e91a7c9fd8f417fae. 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/AR4C11800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b73bb9e38f2ad85034b0583ad3c3c2a319cf40c281c7a7cc68dc39b8e8dbdd. 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/AR4C11800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3e6ffa8b5c68e6b536f4ac3db721eb5945e777bbc39e597c1da7afbebd3d49. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AR4C11800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e2e1e1e8f5ad9f7dd17f9b4e630900bcdba460be4c85ed2bb4e89ef606137b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AR4C11800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b001e6274469b16b5a314881374ec7e5963f71326b18422004b3381e36a6b0e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/AR4C11800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d69fc6b88628b154cd859903615d73671f17b5186dc13cc623931f9b8767eb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AR4C11800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57495dfddee1ca47e90f396122af83a5fe263c562193d10497840965f7b5348c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AR4C11800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6994d09572482f65e80800625f428eb91c8b28931be72633ab8b0e54f7f00a5. 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/DEH842300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd42b6f3c80050aba0d9df3717964f9357b58a16508f4205e3fd8caf53b2ffeb. 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/DEH842300319.
Echoes (Seven24 & Rediit Acoustic Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f89e9dcc5b0058772c020a962962408d42c78dc46f8e2c71d2c9afe0e2cc95e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEH842300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326afcb4093ac7c8f1a534a750897cb0b9fab39e092e45799fa2c0fa792e916f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AR78Q2000607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975816e34311a723604e9ca9173d729ee6e9db5a5467bbe1fea5933488dae55e. 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/DEH842300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aac0c04a0985dcb7c0f967ac21d4e875044734fc1da4341f9787277cdcee4f. 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/DEH842300003.