Lucas Mascarenhas Santana (born October 18, 1970), known as his stage name Lucas Santtana, is a Brazilian singer, composer and producer from Salvador, Bahia, Brazil. In his CD, Sem Nostalgia (YB Music
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 0xd6107447753e7570678c94ad1e4b050503a09337fdac6c7ed3204ed64615e93a. 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/dca9aa16-ec98-4e60-a157-dde0fcbed38e.json and https://artists.proofprofile.net/proofs/artist/dca9aa16-ec98-4e60-a157-dde0fcbed38e.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 0x8108c4155d2b8a7bfd2eb68b509805aa5fef3c38015a81f8e6cf484345e22d1b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBNQA1100003.
Remix EP Um: Burnt Friedman, João Brasil, DJ iZem and Alexandre Coutinho
The God Who Devastates Also Cures (O Deus Que Devasta Mas Também Cura)
Trilha Sonora Orignal: Alguma Coisa Assim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775628f8fe0b6524367e703d2d739bd2677e82dfa90551dc33932eb526e33bbf. 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/BX88X1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b9e51d1f3469e7f8589ac04d7bf473eb12a84c999b2a810a245d2a1faebcb3. 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/BX88X1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43e3cf6ffb7afa15dd5c31dc7affe1117b944105ad996e08a57c3030e0c7496. 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/BX88X1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1cdd41afd8f4e2a06681377bd97f077f761760e05393ed04772a29960f7102. 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/BX88X1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd637468757cc2908ee25fa7852a35df9281f0bcf35b39ec6a6f13760dbe59070. 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/BX88X1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e492cf5609f2aae140d758927951a18cc8b1b1c72dcb1d8b5f67b4418d1f54. 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/BX88X1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25236ee49dc310a7281f4f9854b091d66b0c52e4c593583fad37ff20bcb516c8. 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/BX88X1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711934302eae65660a7cf1e4194a65265556017133c89ca31d7d7be05749c3df. 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/BX88X1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e824ec44fb48d73f85bc82d767ba9352bba42ea20f13497c16d5b776c5b2b4. 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/BX88X1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4675dca2f76fd76bd159047be526ba07328072ddcc7129c856a46de06e36553. 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/BX88X1900010.
Cira, Regina e Nana (Groove Delight Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3cbe8e1767978fed06f041677398e32845af14396e2c85805610444af17fd3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BX88X1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a42ba71bc72089426ddd3cb45d79a363094f08b263602aaf0d4fee900f61c9d. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/BX88X1900011.
O Céu É Velho Há Muito Tempo (variations)
3 Sessions in a Greenhouse (2021 remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7729aeb6e664782c6b21cda7b66e5dca7bfe0f1ff5faba9a8a6296e1eade37. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/BRL6M0600004.
Ninguém Solta A Mão De Ninguém (Jeff Pierre Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247197f9ec993b4d9c8c348fdf3ea6b9fe71d79d38421834b2efacecdf22fcd0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR2W62200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cbc4bffd846309de3505a1e8cb384024f5d65671e1bf598290bbf9805cd778. 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/FR2W62200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e70ef0896c0622661b9fb7cd55056453fc39c90dd1b9b0975379be7bda157f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR2W62200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc18090b28e39d498d61131fa77653fc71ea215dd7bdcb099588485fbab8d2c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR2W62200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8356bcde655c8ad8c65f397a984bc5fcdebabab0b35426bd324e7841ac22007. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR2W62200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247197f9ec993b4d9c8c348fdf3ea6b9fe71d79d38421834b2efacecdf22fcd0. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/FR2W62200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fec22834e94dc1fd43ce3fd679ee8f2c92f3bbd926d5657da225661f52e60f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR2W62200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6f2e35082520a6ce5697597a1bce3727d220d4fd4ce832234216985ce4652d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:07:45Z), 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/BRTRB2500032.
Cira, Regina e Nana - Groove Delight Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da1f3cab8d5d385b082002559ab6f6332804835a1d55fb3a1947a5b8b7dfa68. 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/BRL6M2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050de81d248202b8429d1246f42b27de6cb3c56e903f949275bb6372e0cc7cfa. 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/FR9W12311636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db9e3c8d0e2d4165a57be133107a0737d966f3aace534a53f80e0d548a46774. 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/BRH7D0900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffd383a0426e378afd89e827da5257780a620f7c47b294c5d85dd8be7f3ab79. 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/BRH7D0900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc447b208c4c0880279df454279bbba4dec840c0519c7fc8043b93b0d92f8726. 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/BRH7D0900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b36f3d06f8dd3e49cc0932cb972a8de2cbd1fd58bf330cc491eae751652fad. 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/FR9W12405124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433807944993492e83fa985532ca4f19f48906436a493e5a64eb0178e0b1d37c. 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/FR9W12328207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186dd73e79e6822fb868fd044a82971a676e241bbf6f5bd7ceefb5d4ef8a742a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXL561700006.