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 0x1847029dd83bcef0e03fb60abc384bd632f6441c121a66cbf3af21c225949653. 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/b9145680-2bdc-49ae-80bd-a16aaa38cd79.json and https://artists.proofprofile.net/proofs/artist/b9145680-2bdc-49ae-80bd-a16aaa38cd79.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xefe9c41a26d4ed76f198bb20d05df9aa2b1a17baa7f3d38ed8901b6c05166358. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZGLS2092181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d7afeab1048a8443e0f6c84934d182c5da6736362b76879732e178fa7e670b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ62108921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396168f4f2950df0b59e1d4de1e9cee6bf7c3ce44a69ac8a0ebbc6be46a82d54. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHZ62108923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b6a3e9c336b7322dde3e62192758811abb0bfe3ed0f15b62eb00fe4e859f32. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZHZ62108924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b316a2762ebbe631fdd21878733d66c519164bdf9bea3fcce1c72497a3d3d5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZHZ62108926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739cd492bc6c9496f2818edcf64e7b221b7b7a44f89bccf8fd4a3c353eb5ffda. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHZ62108927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed260aa5b803e79f97df30935115412033a05a5add9c49ea064b2fbebcb14725. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZHZ62108929.
Baixada de Caboclo Sete Flechas Com Xangô - Ao vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d0e331fff10110f627919171912a52234aede44c9d5faefecae4897424c4e1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ62108930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0a7fa26458d6d405bbca8db19b20ab8ee7cd77d489efb957ed976a0e352596. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHZ62108932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da9177e364fc1193f4c457eaabc09345b6eb8cc125e4c7d76f4d0d541c1ef43. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHZ62108933.
Pátria Amada, Dois Sóis, Chamado da Floresta & Pedido - Ao vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c663472cbfb959faa1efeb0b4623fbedbe797b1d12368533fde7a66f99d7f48. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ62108934.
Estrelas de Ouro (Ao Vivo no Mahadeva Studios)
Dois Sóis no Céu do Renascer (Bônus Tracks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f343e056dca4a92f9b7b05e480542db5dabd9e92632b9a969546200eb3196d6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZGLS2301154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7ce79e26f2272d98ecd6262915b7967032987dbc73629d8c2fe2b87945251f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZGLM2362991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b874d6a8d005570a7da3b21b9677fb7824225f2d2ccfb1163beade7030047a5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZGLS2300869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1330800365c75f4597609fb36b6b1556a58728f2930e1d8d5d61b2986e267c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNJY2394237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dae258c4932b1d6e7ea4191be2ad23e2ef0c771871f501d571d25215cc570f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNJY2390478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7da862d4a3f51a5ee9e477d3cf4a1b6c3c7f57e3a68effa24834056883977d3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTVM2389468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b8bfc86d747ab7f1c838823aab13e879a6f78419696b62d1f435093e659075. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZTVM2389466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3f78c7738bb6be0b767513a41d03949ff1528c09db68dd7608c7da06b3bef7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTVM2389462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf407c3102dc03653cf3506fd65bdf82dbb3f77e6157ded6df203a21b3f89a34e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTVM2389469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc890836327f969f9fdea17047c2f67897377b5eea57fb990c730706105cd20d. 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/QZTVM2389467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6817a6185c25c7f98ea22d428346d34537b12fc015435e08bd6b863f4aabc65a. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/QZTVM2389464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3291508cca1000f70303c5d4d96aed9f20384cdd35860749db39bc21426210b7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTVM2389461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd81b645ba247263e292655c1f6e1a524d74e332b599245425df62259e9af920. 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/US7VG2485477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b7b7e5bb35d2d6ca360455ea41a7922579eae9daab7f8434874e276221c370. 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/US7VG2465010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0be12eec8153764e915e8262be629b1659c414e91b769612855b569dfb1c6c. 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/BCO5U2300009.