Ataulfo Alves de Sousa (2 May 1909 – 29 April 1969) was a Brazilian samba singer and composer, best known for his collaborations with Mário Lago, such as with Ai! que saudade da Amélia and Atire a pri
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 0x61d73728a6586dad8d1d13563e6e6472edb8b5e147ddd6a6807e81b85e8c2039. 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/d7f88201-9a31-4c3c-8af7-eed692976366.json and https://artists.proofprofile.net/proofs/artist/d7f88201-9a31-4c3c-8af7-eed692976366.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 0xa9892a54f4888f7f43a6fec1f8deac1e29bf787de658877392f914f1519c2be2. 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/USLZJ2203941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8492b06835cf29dffdc77bf4e7b02c7f7ed16cda6228d04d25885261d3b28d3d. 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/ESA011578542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf00bd3477f86d32a26e3161acad98ed9e8dfa52cf82831c1c8bc7a3335222d. 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/ESA011578545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd19fecf3f36cdac03376a103bd30643cedf884fe222727f37abb4cd3f95151. 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/ESA011578546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82fe02a64ae4028ade8f8da19086b4a45f91d682db699d52feb5f142d2a2b92. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:42:51Z), 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/ESA011578547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638f46eee0833ff15836479a8cc807f135e5a8d4f8c00c2e595813513f7420a3. 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/BRUM71903307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abbed110588621d6465106ab99bcc426d7a19750bbca43f3505ed84671aa9bf. 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/BREMI7000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952bc72d5202e0738da2459aa0526cb2cdbad1ddf39a4c2a72ef3ba3d8d735a4. 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/BRUM71903310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9297ca7d839f5b364b4cee431b1e4e9a52654fc8e6185bd89b0abdfcbf55108a. 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/BREMI5900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8fa27df7c3f860321943dc5d4df6553efcc5302b7e056671932b1a7c4846e6. 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/BREMI5900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa72382ed3bac19cd42c9dbc83202a6ce0a9f2f3afa1291bfa784022676a1ff9. 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/BRUM71000875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab7c08fb4e1c91eb53e6deca497d009a52f0ca78e823e35bffe6796e128e64b. 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/BRUM71000881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e33cb2386df91759d9a2b834b94d1c4034f84c0a65d77ad22ba54dcbe06454. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BRUM71000865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b1649717429805bde34b24f801077636d4b75438d5949281ade4ccf79d998f. 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/BRUM71000868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de609b17e6b2a01b765cb43ee93b8a0d064ff8e2dc06a42d003e4427f9cadb3. 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/BRUM71000890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05420c62a846cfa6985c8dfa3c7db678745085a88e2d16942b05abdf002f0976. 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/BRUM71000862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630c64a2c2ac5e75818cbb309d70552346c7e8c488eedbeb683ee24e9982155f. 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/BRUM71000886.
Vai, Mas Vai Mesmo / Se A Saudade Me Apertar / Se Você Não Vai Eu Vou
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb3dcb47d6017fb7a65d085d1c54bbe3bf8196491e8dc07ab01855fd8835ac5. 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/BRUM71200030.
Ai! Que Saudades Da Amelia / Leva Meu Samba / Atire A Primeira Pedra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd8358f574ec2d7db75ce4090636371e5805b99a642576ae7eabbef7cbc8d7a. 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/BRUM71200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da8e6e84ab1d817113fbbcab9432311a221c70abb6122eec16c216cb349f105. 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/BRUM71200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022123ab32cfa70ea82377ce4ee1f4449bcec7522af9f5dc22bc623a9ea55027. 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/BREMI6100289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba34697dfcd14c1bd2f35c234c8fba7578e903d3980f7bacecf7efe3fbe3be6. 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/BREMI5800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb9de47dcc04b32f48467ce199702cf042d02306c431c39bd345b5e217f6f0d. 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/BREMI6200288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5bce28ca14a5486222d79828d81a289f40d0d4df05a18a96b013c7968c6ecc. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:57:25Z), 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/QMDA61341914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2af850eabd69f6dc46404405bb7d4e1861362eac67a6202e7c342b611a786f5. 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/BREMI7300347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fe617833fbca2ea528701e6bd4e71b737a7aa0517632c7cec6b23772aabe19. 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/BREMI8900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3391ae8ef53bf1ca0ca02b8b8e75617b7f9576a0580608b1a9857716411f49b3. 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/BREMI7500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440e844829a9e924f6368826fe08cc7cf9cf63c0836bb042e6f2025aa7142039. 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/BREMI5300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bba24ec1af742f63f524b3cff6bfe271236b45fca05a0eb454fc0083026e842. 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/BREMI7100636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ffa59fd7a2e39aafde574018aa343482000fce38d2e0af712a1743269153cb. 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/CA5KR1579216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf465e44b783a7780a01986290393aeb8c6f83f1a799cd4a258aaa170ef115706. 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/CA5KR1943092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92d7c7d017343fcfc063cc8271fd984ca5437802944d004934380c78011109a. 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/CA5KR1943100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618ab967266521f1407410fb34a4dd33b598299f43e76ec6fbe26bff0a7cc38f. 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/CA5KR1943108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44805d4a74b43717e935fb9b68f073736c5d93e09cd64b84a5ee48876175f1f6. 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/CA5KR1943110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0841ea7a1ea7b88d27193a2a2604e2c4fb442e7f2d37bfccfd095874dfa382. 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/BREMI4700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b26865eba5058948b1ad7b7dd0f6058ab10f68179ebeb07769c1e66e9e3609. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRVWD1900230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5966d97ffec29fcff1d647145575eb1f34ad8935f5a426036289f1417930448. 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/BRVLS9400592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd8f1f715d3962c1706b444b450ca88eaa526ff8ec17da8aa7c0822643fd195. 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/CA5KR1943014.
O Som dos Terreiros Vol. 3: Pontos de Caboclo, Erê e Preto Velho