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 0x241a29fccea1118a837f6ce4bc0d284ea28fc773e3624777025ba0fa479e6a6e. 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/0e21bbfe-e54f-4dce-84f6-0b35a99da0a5.json and https://artists.proofprofile.net/proofs/artist/0e21bbfe-e54f-4dce-84f6-0b35a99da0a5.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 0x0e0affe8671a57dbf12b4d8d2fbddf99f30336c97a1a716b8f21267c3d314524. 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/BRBG60900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dadf8736a3bcb756a0c90bb5ed35827f41e8b50ac0edb019a386a48f51899e. 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/BRBG60900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55744f2fb0c23c2be1fb9bfdd56ff0b6c645296c9780ef4807a8603bd7ee376d. 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/BRRGE8300057.
Canções de Mar e Cidade (Songbook de Sérgio Habibe), Vol. 1
Não Quero Mais Amar a Ninguém / Pranto de Poeta / Todo Tempo Que Eu Viver
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96188c23f321e70a55dfd574b496eb0a2967b6c6ecc4a27102c442afbd9dafa3. 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/BRPUI0600081.
Exaltaçã À Mangueira / Sei Lá, Mangueira / Mundo de Zinco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95088569326d553af5856e3fe95d1400fecff16b51202baedf2f0f748a1dbaf. 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/BRPUI0600088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611bde934fbed4992353a50ddb4bbb1b4fae51a1534d13c1a1936c5fd84d82be. 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/BRSME8500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c860d6509eb431ddcba322039d939ad1f212f6f285b68e6c9d2538ed4f8325d. 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/BRSME8500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d8ab2f45507ec248497540a3833927eb94418abf2da295267288eb44a6f65a. 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/BRMCA8300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b32d3858c748a24d3b676f8321e26f82cab7671962ff2376562304195e4849. 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/BRUM70700543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7d7bc47831144b989a6e3dd0868a37156811c06c83174c7954d486b3f6dcbf. 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/BRPGD8500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df92cd790a9e868703b88c7f5e9590011fa557b4d81c7ffe63cce0599f0c891. 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/BRUM70700540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8514f9bc9d71b77e7b0307bfb79cf0464a675bd03fe83bd770c8cae935b2c1a. 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/BRUM70700541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f29442c1dbf45c497d6cdf4e93a238d1c545f8e42c98ab885fe6c4d86d532b. 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/BRUM70700544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852ae0228a226f33ff4bf35d53705021ae3ab9097637016a47b715d0ca049fef. 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/BRMCA8300168.
Direto no Coração: 40 Anos de Acontecências
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c1ab08b37f9f88988703151ef05e6f01bc4f39b37e084a8699e080e24d9a23. 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/BRU0C2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c9cc46fe34d675dbccbd49609a02e615de8ad1a6a8557efb6c4e26a1d56d32. 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/BRU0C2100010.
Integridade: Parcerias com Felipe Cerquize
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04615d7d7687a2d1235b2309e09bb7229017f0c4995036971ec84150f61f35cc. 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/BRU0C1700001.
Nelson Faria Convida Claudio Nucci: Um Café Lá em Casa
Viva o Letrista! Vol. 1, Luiz Fernando Gonçalves
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1ae80d632c8d84ac14df8565319eb6a22b46e73cd37caf43df2c0ca9ceb4ee. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BXR1F1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2fe4af3ea633cb93315cb3a2592409152d1eb31a603b91ca34a47ea203b0c4. 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/BXR1F1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5e25adfeb6962daa34d0b844de97b9acec56ce232225bb2ee36e41d9d7cc4a. 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/BXR1F1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9c2e817cd7463ac00dae41e665e0ed3ad0cd987a3bf26a0263752bb8fb6ce3. 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/BXR1F1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9d470f8f1c6fc88b191a91fe411a0ef69af696a1ef282ccc550a0e647ceccc. 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/BRMVP0401106.
Christmas in Rhythm & Bossa - Franco & Guests