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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7866bb5e3b1849e8580aa88dad4e1d1b28f28357b88047bebc745bfaec8ef773. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb8733f6-2621-426f-9733-65b52265916e.json and https://artists.proofprofile.net/proofs/artist/fb8733f6-2621-426f-9733-65b52265916e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dce647b2b006fc81b81116f9c690eb0efa681e078f5137f46ad925e62389fd5. 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/BXSVC1900809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be3b7240d44015133e15d0da1e780a30dfbad0ea624adb21e7c0744bee8c858. 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/BXSVC1900799.
A Voz da Mulher na Obra de Guilherme Arantes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a56b0299b7047e0697bf760e8da034e31789f1ec92fa04582bd0dbeb6f32527. 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/BRTRB1200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc4bd772c64317763e3edfcf4254104efe9b7a8a3b725cca44bd6429b1b3b0d. 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/BRTRB1200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53681c362e671592e4157b0ece79c9f5bba5e9afa05037de7c92df8e3042e9c5. 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/BRTRB1200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93e849f4453b5f765913fc5c12a6e926caebbc28b435774d9a72ee941630d62. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRTRB1200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fb3b3b7f255060daf833b58a98f406603299d2bb137629a0bc2158d90188ad. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRTRB1200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bc89b8a075e985f8b7339e8692e321a6eb14682cfffa1ccba4032976d67a10. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRTRB1200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa364ebde899a13c45f677a6e10668ab30e1bf5c0cf5e45bf8562d03544cd1d3d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRMPU0300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cabf99e746f09454fa6bca1a0161438fcec7ebcc24c1dc01236bec6ef3837ad. 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/BRMPU0300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6f4e19e4bacc3b7356f09d336c399ad16b25cac036e257d99d90b2ccdefa8d. 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/BRMPU0300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42020f01c99cb36cb04f1964dd2a0b4588dd972fb499a3c26e9937664172ebc4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:04:09Z), 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/BRMPU0300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba13ec8ada50cc075373cf224d33b931844521919ea60d7aa9b52cb93261cf0. 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/BRMPU0300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc06be186038bb71748c9cad754ddca01f068ff62e3f2230960f17f7382aac1. 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/BRMPU0300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576c6d73937f030e88150bf20b20c721fe6bddca22941b4a17da1c256e011d50. 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/BRMPU0300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2995c8a4bf359bd365173c3eab7ca055f7217bc815fe1ad92b3c780fa3c874. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRMPU0300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68362f29a75367245d5137994ff3352bddecca5a91b63b3f357e6ae71dcd701f. 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/BRMPU0300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf105a9bb7ba68dddb061278d1742cd431c042ae8b7c64631883a12badb6f7c7. 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/BRMPU0300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e03608e996b4c43254f7cdd08d96c303e250b47844b1d951e4c8781db9bcbd. 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/BRF0O1200011.