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 0x39a0ea9e5bcb114baeec37b996b84c8dd5349205fe624c6e948ca5973b21de5b. 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/8be5589a-b264-41b0-89d4-6d6f2c1391d3.json and https://artists.proofprofile.net/proofs/artist/8be5589a-b264-41b0-89d4-6d6f2c1391d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Projeto Cultural Na Cadência do Samba Yedo Simões, Paulo Onça e Convidados.
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 0x994f4142b09caf28a8920747f7101a738639fae2ef1cc481cb53322282b2e74e. 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/BRAA80500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e95153ebc09d570c34cf9623d86e3ab0c10227eb21c0a0f97789b960614862. 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/BRAA80500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac375946583feb98a88974e506fd82bd407fa15b1cc1d23847a487ab5383c67. 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/BRAA80500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4e9335f15e63754847c8ca7e10cb2dc401688b7e127bce15c7f0d6db361558. 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/BRAA80500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392008591f1c013b316bc5b3856c24dd5b24c868460a9df6c66e4520cf9f7f6d. 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/BRAA80500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc0e6887ed6eeb628332aa7295826fe0b65206afe8423b30c880176573ef487. 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/BRAA80500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3f7e7c2b6be546301aa6297337b9fc7871664cf4f7a57dda3359b30bec7ca1. 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/BRAA80500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c85e63f878fc201a27428e6ed2acad911f5eb7aadcb6a7ff9ad12e29431321e. 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/BREMI9300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78d0913c291faa3044c43e6e42a94d046477de175c6894c0866572ac6a99a81. 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/BREMI0501549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b229f05888dfeec00f415537fb168baf99ebf9d3d2134f7e4adffa81caae138. 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/BREMI8700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c85e63f878fc201a27428e6ed2acad911f5eb7aadcb6a7ff9ad12e29431321e. 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/BREMI9300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9334beef3fd8c2afd2c674adfbaabbad6fd9f9f60c8efdf2331e11ff506556b. 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/BREMI9600388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9945bb2996488c7734f19b0bb8c87617b0cbf2a6eadd527e8ab8c7bdb4a77e. 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/BREMI9600387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cef9a1753e13ce71aed82c73521a76560057f93d836038a36d96eda731d07ed. 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/BRUM71704630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d9973cea1fdcee3c0663a923a09995ba8aa1542a72f130fffc1feb84ea0795. 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/BREMI9201042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322364d7a66cae331ee32d3e9b93034e669cb47a00617ba0ed0cbcd3c18755b3. 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/BREMI9201038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c42dfef5a757716c008e7597210253bea8c48ce72575b1119b0069e741192a1. 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/BREMI9201043.
Viola Em Bandoleira - 1996 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec355e1c1dde8abf99a0bac277fb1c4773ef320a17877cc11c545c8e7f3e3bb. 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/BREMI8600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88889fab847df68e1c52f95ecbf5d9ec0b6939bf1bdd3c9307102b5da0dd764b. 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/BREMI8600428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2c83e9f7f85c4a2e1947c60c85e43c60092b2ef1c262407a10b49b883121c5. 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/BREMI9600146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac0c7ba73ede29fb3f77b64c5a392866613a7276c4d1d57543b6f41f58cf20a. 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/BREMI9200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b16b905a614e3fc1297488cb52a89d05c996165d3f6fa96317f052253b618f. 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/BREMI9000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddbe6ad43a751e1456c6c4613b348682a784c30f6952282f2a81ff0f53a65f5. 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/BREMI9700519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b0b3728de8d71e73367ea4f7e1590033df56a4786f89ae82f1d52cd39a34c6. 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/BREMI9900118.