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 0x967f141d38dc9ed50e7bfc358e6809925ea6ea365a1fadf59476533d7bce1a07. 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/7b3a5b96-a242-4ec5-b534-844860cc47e4.json and https://artists.proofprofile.net/proofs/artist/7b3a5b96-a242-4ec5-b534-844860cc47e4.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 0x98b3313a80888e8c6bf79f7d70b7fbc453f261db1cbde5242ed72969056854d6. 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/BXGOA1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf92e9a660d80c3e9b7e2ffdcf812372516ca778e54a0350d60cfc40d1d2803. 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/BXGOA1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530f45fe57a7d09b66fe220a8b9be43ec40e413238dcc717a8a2265dbfd29fb2. 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/BXGOA1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87a1b9c9e6e2fc846cd1ff2e671ae12aadf8e4d2c6be4864b81b210f34d61dd. 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/BRYJL1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d29ca86921df8dc5de6ae636445d16b83df5e6985be3ce48950de990605ade. 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/BRYJL1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d359edae6b37ccb5672b5dde7b0394d669c97674505acfcd37b6e6155f2218. 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/BRYJL1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5626a9b6726665b6a3db710751a54f88bdc09e1239d967f59c8afded18f89f09. 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/BRDEP2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e57bd00bdb8f35e2ae4f8e40a1aa4b8edd9e608542aca786cbd17c295ffd10f. 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/BRDEP2000287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58b07f5b09cf469ad09b72eb15a532804b7ee98ab3496626f42b92db9be976f. 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/FR9W11923152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25ec85de73832f353dbdc1637af8e83b08e33e2b9c7cccb088781e4768d0760. 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/BR1XO2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd328a7dfa83cee2fc46f9446d7d30b23c67c5537b85fd0778f7d5952ea82577f. 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/BXZFL2100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35597e812538e3790eb79a266b0a210c219af441992372b36e9bdc1faa79c749. 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/BXZFL2100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8ca641cbd4db75e1a6199c042d6dfae4a53e5d096e6e4196f5af612307198a. 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/BXZFL2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42e938a37bf7dea5239b9e5b6e61fb2d94e1675e8a7b4ece400c6f3c49efdfd. 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/BXZFL2100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1831a3dfcb82714ee04047e86adfce73daa4f003661efa761d7c9c076a263a4. 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/BXZFL2100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972c892f81ef58bbfeab74b093f238ffc27fa53efeaaae9a80798bc11a7e46a2. 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/BXZFL2100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8882fd473d0199528e69e19e549e8bb9b269f0d24da1d97ac7e1a6d84d47783a. 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/BXZFL2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8aa0ada3123c55f08f497accda62cf89b4a685fc99b7f280588a4dac115597. 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/BXGOA2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610580fd7f2fbec8fd05c7ca7f96840188c0f3f5df8f724f0804c00fb9a042cb. 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/BRDEP2400371.
Mandinga Multiplicação - Josyara canta Timbalada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5645bc3a14c1eca7fba174d1e5e12f48b29d750ff19a1c328629fef0dcd1467. 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/BRDEP2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45c2f30a48014398e25287723cbd950b8648a1c212536e684d30ed415aa3fc2. 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/BRDEP2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06a6a0d6a006f3a6249de4796032aeb20144c19a04dcd94013aad71a126aa69. 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/BRDEP2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe1e578d5883db40d8e48094f703ba2926617323f431a01d2a2431365f1844f. 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/BRDEP2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe919a205579b67ed464f92d933e3803913af243dc9690d48eaa81594b75bfa. 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/BRTV52400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4f8afa70329aad22e51e75b59110a10addadc647217990242095d06dff5e73. 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/BRTV52400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2efed1f6658b046b7b0ebdbf4621a6c7a2dc3eb644983e3284208eb73a74002. 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/BX15S2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c631af4fcc206e539b2c3d94bcd2b5e285569893175a043bef1fda8e052d98. 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/BX15S2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65454fe6a6c92bd2a9c7bfa3be9aa65e11a7151f9f613c125189e50f98aa308f. 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/BX15S2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e07067b48b6adeb6c5c3d6d555017ed11b1be5e435a8a65c0617cdc3e965cba. 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/BX15S2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684a05d323423bcbb42e5dd9ab741111805f88024737bd10933ad38ab69fd686. 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/BX15S2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc096e249744e49d27634cf6af45a0e4c7eda7f86c97e75314deec00d0f362150. 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/BX15S2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb633e1c5f2e254184901167795977cf25080d78a2c14b21951bef46de12a3a. 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/BRMSR2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f46222bc2e82d95d3b36ecb94ade8de5399261d1afcb72ebbcaa1a4a322ade. 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/BRMSR2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6116b9603b5aab5732102c68430085fb9af2167d16cb38b64b5d6cd03a4445. 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/BCA5B2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7d0df3a08ddc55f8197a0c0cb61bda00fab0b85159eed72e852cc4ab3f9af1. 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/BRL1H2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88689e1e98903c9a3c3de3555af5965048615b69e7becb978a0711cae3a79b0c. 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/BXR1F1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e9b0e3754c21247bd36116e7bde072a42d12de42a981fe60d990a084934c6a. 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/BXQQ32400005.