Roberto Agustín Miguel Santiago Samuel Trujillo Veracruz (; born October 23, 1964) is an American musician who has been the bassist for heavy metal band Metallica since 2003. He first rose to prominen
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 0xc658fcae29ce4b35539c28bbacfdb9809632b6d42e58732517010400ffd9949d. 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/3f0f02fb-fcc7-4a0c-8fdb-2e82dffa66d0.json and https://artists.proofprofile.net/proofs/artist/3f0f02fb-fcc7-4a0c-8fdb-2e82dffa66d0.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 0xff29b4ea20ba0062a54ef625db9333e6d7a9494a6c2dd613f86d29a8c1bfe7fd. 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/USA561057125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c33732561fac8f415c0cfb24dd7ee2e41350ee7787f989f9c960c629e93d804. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMFMG1354987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac68178a71c24037381e288502a2fa5370073dc26a4031bbc945a12cfeed4ba. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QM6N21425428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1da83867335130301a6239c98038cca4f33dc885fd2d87ae02a66a3d353c02. 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/QMKHM2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1da83867335130301a6239c98038cca4f33dc885fd2d87ae02a66a3d353c02. 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/QMKHM2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f855e9422ecfe95d9b2aae823224ffdbf2f2665569567ceb6603c043d4a739. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA370948174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac68178a71c24037381e288502a2fa5370073dc26a4031bbc945a12cfeed4ba. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM6N21425428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc4819bf2daa2c1c5c384a620c61828921bde0c2327069480b8beebd57bb6e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USA371048089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7b8ffb542ee95ff03bc54e1488a864c2b34e4058a0009dfb268052b474018a. 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/USA560748938.
Metallic Assault - A Tribute to Metallica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7326360d8f1da91e6d8333abc6d37bf0fadc5288294ffa0439ca51d78a1ec1b4. 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/USA370567591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c656d237549e4360cfa653c118a16d703cd0dad5c7596e694d593630748e2af. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA370567596.
Nothing Else Matters - A Tribute to Metallica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8230416fb81062aae288e8daeebcbf332362ddb50a68de1df732e0ee78e3df29. 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/QM7281495718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215a253b759ec88c1b06c6b4ce4b171974139a59da7989a1da0e26a97e8ad969. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USA560840982.