Sambalanço Trio was a Brazilian samba-jazz group formed by Cesar Camargo Mariano (piano), Humberto Clayber (bass) and Airto Moreira (drums). The band started to play in 1964 and lasted for about two y
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf772d0a5751ceb05fd1275dfdd051f8213c0469081c63273d40c4ba7209b644. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca8afb63-bca7-4620-8e2e-14036b6f0eb7.json and https://artists.proofprofile.net/proofs/artist/ca8afb63-bca7-4620-8e2e-14036b6f0eb7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7020ad4bc10d7b0718a430744558379bbca56e5e0311a66a6af6d2c15d2daf0e. 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/BRSGL6600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab1542890b8e6e3662d6a485ea5bd7ad3420ece774c6bfea4038b439002206d. 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/BRSGL6600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8284192a1e8656d4e71962a86d11c611ae16dc786386ecae486b7be7ef67b7b3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRSGL6600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a31b34cb467fc39295eea05dbafcb1536ba8934493ea5ae100569a562e5f8e4. 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/BRSGL6600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5432a4162323b9f85e77d5db1b85f272e9a8783383f307e8f8cd024987d6dee. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BRSGL6600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3d9f4389f2127d5ff2054cc565504afeae7a223defc6a1a74cf5ca62a46fce. 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/BRSGL6600063.
Pot-Pourri: Samblues / Sambinha / O Amor Que Acabou / Nanã / Pra Que Chorar? / O Morro Não Tem Vez / Roda De Samba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd50333415a2f89ab22209f1ab495ad08dab24c2a8f8e690b36a9d52e642088. 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/BRSGL6600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24efbee661d3867ceabcd04e89b9ac0520e2add349af50cf2d27950dd28ec38d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRSGL6600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c31ef7ac716136edf071ba6eb16bbe61588ee1f11b582eaa561a602741af4c7. 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/BRSGL6600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d529a45fb3cca9fbdc66cd7a1810312d12ed86afb62be06fcca66491359b48. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRSGL6600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ed1c5b99db7ddeeaf10ec8d188ae7582fd692e498f31188ab401a8965cc6ed. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRSGL6600066.
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 0x2480017bd45a8766e6560d024e4e150d0bf3b76719876695f870cdf9d2381aa2. 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/BRPGD7600126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4961599c6d445ef7ecc292348a6f7371e60f81647aacb8cc07b75427c5c41ce. 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/BRMCA6500156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234fa4ba1f280c452a3b32cfd7e9cf2a7d1435512c88650ba6326dacc6271317. 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/BRUM70900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2089402ac482e346f7dd8f16401f11672d4f304e4fc172aa1f49c971e6e938. 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/BRMCA6600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3884ca0c446b890aa213f86d5373c3df552103120c57f81d2712a8a4b5ea729. 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/BRMCA7100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990edfa5574cfdbeda621649c0c79f9a0433748a4b1af2b630de996217021fd6. 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/BRMCA7200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a36df67dae2aa944e5453c2eb029482b032378ce9b0e926e4f7d33063b3142. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRMCA7100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4710f084c7e340dbb41b9423b65615a9402d72be50341e2c41d21e3a1ad7daf1. 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/BRUM71101281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af0f0401e7bab7b92671416560617cd3621101aaf862b21e7866eedc516a5c2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRPGD7600089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cbc84b28d738fabfb447e6be4b6946a5206203db1d357337dff643f71ec21a. 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/BRWMB9701711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1558edebff6eb3426deb51e714868c378f124b894ab3d2adb2000004a7c69c13. 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/BRMCA7600127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935c217591eec1c58edb3d4051368466f8ffd15dfa7afffc5469ed859f8a791c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRUM71101274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2edb9d2db5c08ea151b5486cc92efbf89fdd5021ac422211c3e65d2b7c68029. 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/BRMCA7800186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2a9712caada00df4eac2a13c13a67db70ec0278507efe6e4483bd2c45f9e85. 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/BRMCA6500191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b11c44390f3cbd68f20ed12ffd8b23cbe6dcc0965877678d931e177ef2d4617. 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/BRUM71600618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f718f5d5c1b42b456a8da227ebd7eddb54b16083ddf6270fe2f99d0adb7c7b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BREMI7400190.