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 0xd0b5dc33576a244d6e6c4333e1cfa5693b4ab3188972a027955458c11ab5611c. 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/8e9cc8d0-9d5f-4c4b-ab26-2ec6b4348b51.json and https://artists.proofprofile.net/proofs/artist/8e9cc8d0-9d5f-4c4b-ab26-2ec6b4348b51.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 0x9c75160c9a975cb42bdf605ec7ded1ae30f5ea040b6ce261f707ab86b04abfb4. 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/BR04O0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a2639595914ac9d11d8cd388bf11bdd902774868c1a5431395fdba93c9593d. 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/BR26B1800001.
Sessões Selo Sesc #8: Toada Improvisada - Jackson do Pandeiro 100 Anos
Afternoon in Rio (feat. Thalma de Freitas, Nina Becker, Kassin, Alberto Continentino)
Brazil Classics 7: What's Happening in Pernambuco, New Sounds of the Brazilian Northeast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a71a3ff430ac61d3dd6b227a92905fcf46f2f828ee183dc6c03c29bfd4a63c8. 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/BRL1P0500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e3d28296fe97767f124e7eb7dfa1af068874e1249da9c349677547170d1878. 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/BRWHC1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9322e86d67173534efebdcf19d40213c2224f274bef7f97545dcd5060a9e3464. 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/BCMP22400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ad92e4049ca66f844c4953d69c4028e324e8d90c113aa3773e8503c81e8f7d. 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/BCMP22400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0677e0be2faee043cc978e0dd15cbf1aae304ffdd348ea31c7173198689a3d. 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/BCMP22400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b45803425298c607d228a02668fe50035a71139152e0184794e7b2a4a8a2a3. 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/BCMP22400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25c63d148fd5aa5462674e733fbbf9c51f0fe4bd98a0ccece620648b9818ed4. 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/BCMP22400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb08ec0389091f5a0ffa06fed50bdf405dda8911511c2e757b63c907d5f7ace. 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/BCMP22400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd5f98d8ffeb1930c672dae81ac11151eab03686bfaf5905f31a0911477b6c6. 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/BRKTI1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f56d48f02555fb3f941a86646ef303c9a24e0c632bd9f90c0f993d8e77ed82. 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/BRKTI1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae495af780b258408777f427fd264f9b184841c9f58b47935fd9eb9dda49c7a. 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/FR2X41640784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11978393fa48273d4015b10f15842e006ddb26afb0b2092ac1029e1b5c0bf51. 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/FR2X41640785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0febcd4d048cf13af06e9bcc9c358738c58f3d11f4378806abee27e30595d19. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR2X41640786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850c7fa1bd687c3d2f855abd9a5404f8ad289cc4e79c08223563c9c00c3dd408. 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/BRDEP0700281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83029dca79d8d429200eda16e9d482982c43a70faa1352cf7a938ed9d08b1884. 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/BRDEP0700282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541aa52b1fe93762ef1ceb0b32cfe7011bdb129d5261c1f5a348d44264e97edc. 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/BRDEP0700283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1658cad9e5ed761c21218ebd4eb975a3befce4fd2ef1ad4f6287c210bf8685. 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/BRDEP0700284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f52e8e2e36075d259969e9c3696bd373bd3155fd2b04368a570d760dd0b920d. 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/BRDEP0700285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130aebb8f041f64b0d1622b67ab477768210465d8e8bf0a8d61318af4b4195aa. 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/BRDEP0700286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0797bf7f601453a1544b06222e2f241731922cc86a65938b588ca83a268ab1. 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/BRDEP0700287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a9bd090156a67aac80c1a59656e07b26b612516e0efa31e693ffa098fd2682. 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/BRDEP0700288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171ed3344cc980b62b6b835caa4957c538f9f2b32a71f7cfff5bd3220a582486. 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/BRDEP0700289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d41bc042597048e36cb7fe21dea2dbbfdc1ff94c5ae48163182ea2068a8224. 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/BRDEP0700290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4aadd784a6ae514c4053db028e5f13697d12e893494dced4b48422e6e97a75. 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/BRDEP0700291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030fc500b729ffb95ce7d3ad0978bdf7e9b31a2979ed5fbae1f5067f10b6dbe5. 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/BXSVC1800330.