Barroso may refer to: Places Barroso (region), Portugal Barroso, Minas Gerais, Brazil Other use Barroso (surname) Barroso Commission, the European Commission led by José Manuel Barroso from 2004 to
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 0x9d4954be6427dcb1c9cae8e2264c1c0c5407c573815cc72a1e6d981aee7424dd. 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/04141b52-9db0-429f-9fbf-055f8d85eedb.json and https://artists.proofprofile.net/proofs/artist/04141b52-9db0-429f-9fbf-055f8d85eedb.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 0x899d3a8333ef1c3c274407de92b01fbf8d2a21a139bd23ee8a6d1f9aab90329a. 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/ES64E2305617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4a2fbd737969a0e2423fd6a74ca88de88987c6078d8502902ae598cbaeaaba. 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/ES64E2200724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40159d74dafda695d582bd7477baa8dbc8a3d08302e56b5ea1a4d9fd87b19965. 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/ES64E2487098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efd3582d7ccba8f2c2738993b7aa2f0a63372baf244beccaf1cd77c9525b666. 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/ES64E2485147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f201aa13aed5a4bcbe004018d5c9fad9e532cd2d8cf018c9b092662b1b2ab7c. 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/ES64E2480723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7897267d4906b630f4e26af9cf33e136fa3e318aafac71336787be4e9b81d5f2. 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/QM4TX2446733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecd9483ecb1304b3506c0d47b7e421b68579e993d5216b9e212b7920bf7728e. 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/ES64E2304851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc2cdc292eac10fcc5feaa9ca52531ab4d10eacc90188364ba3af87d6868b39. 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/ES5152300180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737bd0e428aea601e5886d3849b0b9ed4ee32a362face59ec4dcce2aa9d63a27. 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/BK4DA2302134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc929a0eb303c9ee3c631d980abf6e08f6f8f36dc76e8360163a9ec0a22e710bb. 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/QZ5AB2387194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9100493220ba36d833932429a015c9c8a24756c62b6bf21fd5e2fa0885daa72. 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/ES64E2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691e7515f34399097bb2f8e54e7b128fdaad17cb5a8c465c73fcf1ea2afcaf95. 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/QZNJY2212872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194e92282e0330f864776f3cb5752a9c3ffae31ceaa9ee68262e466774d7f489. 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/ES64E2201660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c2af1f7b65785f346f2b73c402388027860f802d0528a5b56b5cf7c5863077. 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/ES65E2100152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a02421ddfe208c30ff3c1a6b3e333a053d8ec96fe514bd01429f5b313f73f94. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:46Z), 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/ESA092395267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ee698dee37ae937fb784eb6776662b89190cba08de2c02e10c36f6d186861a. 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/ESA092395268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28fe2350b07fc63731500cdbe8cec95e884a0548f967a8b0e4be47059d3e29f. 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/ESA092395336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2de1ae3b0efe58422ff2af8c53741d9650cea002434be9b3598c5a8c8e130ac. 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/QZGLM2569471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a17a9ccecf98fb4a71f61c819c496fcfdd9e2ebe3eff613419354191c8ebfd3. 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/US7VG2568576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604765ca1df2ac4253b35a88acc85006a43f728508962ddc30cdd7bfbf4c1656. 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/QZW9M2429794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaead955ad496f46b6c2febda94c1588f61f2d445c60d6c88f57580229ab4818. 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/QZW9L2437749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e7dd7b8058696215d42088f3446c01f8ea6a185563f4dc0444c7d09b1125e4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:05:31Z), 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/QZW9K2480758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9b7c5c83ffcfc7cc55dd1cd53b385072f7201930808c03771b769a1a5b5f5a. 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/QZTVM2494688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad461b8826eb7a73e6a49df4b19e0eb349a34baec09df51bf72b813f1dcf013. 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/ESA092495466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9757bbde7a2d29b6d220c2f463f6c272ff1446221a7007b0c70ce1bfeae8c06. 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/ES64E2496301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77c09a6b548c5e98f070bf75ea15bae233fc0f1273d65f507a6f7a1cad60f45. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ESA092495378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc6c46571190e43a681395b4dbe9492b35883968a2ec40ebfbf481a1ffa2c99. 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/ESA092495098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0159aa97c7a6c137fed4c52b3d2f946da731f8279e85b242795a0e94d8ee34. 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/ESA092495097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9af1a5f02d27c27497921cec72ac1854a8847ef6de313fb8f46931da72d007. 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/ESA092396114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd462141891aa535cae9b94f9058f217c3e2e904b3b3aace2feafe0823a7eb661. 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/ES64E2300787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2d3b0046bd3ced898f628d7c55931e018f59fcd9aa43b2d59330559b7058da. 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/ESA092395062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359606a54475ccddbb2fa197f44f7bf0b436289e99af08402238de24fda94b3b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ESA092295552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2715ad6c83ee73417f19ce9b881e9f222289968f50d204bf13332dc888ffed. 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/ES5102200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086ca8afc5e654a1ee4cc0aa34eb9026ca765bc2dc09f60900864cdfd2a0b501. 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/ES5102200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0056f61e93c6c8052972d55a5f99ff9f9bb3b37500b8f90d44a0c3398cd64d53. 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/ESA011663122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af64e23fa1f00dca3bf3c64d48b3277d6dec42643524cf10bbc8bbdbff2f950. 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/ESA011783705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a3c10724d0d48387532b73f60f53742c9662189b1845ea9eb930e8b9dd33d3. 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/QM4TW2223325.