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 0xb890e1fba8fcf66a17aba51c16b4a0f194b70a98291c512c96a80cb688bb0ce8. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4886d82-c146-46d8-8b6e-8e049e5ed1d1.json and https://artists.proofprofile.net/proofs/artist/e4886d82-c146-46d8-8b6e-8e049e5ed1d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tocata Sax Barítono (Hino 402 Ó Irmãos, a Deus Devemos)
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 0x9d72a572e4bb13e6b1a5a6b841df789770e35b4e51616a55302815e5d21388c2. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZTPX2457105.
Tocata Sax Barítono - Hino 376 Senhor Preciso Mais
Tocata Sax Barítono - Hino 317 Sinto o Senhor por Fé em Mim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d41a2777bdcfa3205e3ded10898bea68dcd06ba4b03c2eb002588937414a48f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZTPX2471702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083ee03bb75e0b5f3768af5bc384bd14c7b98ffc09938f42a6dac22aad33f866. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTPX2471642.
Tocata Sax Barítono - Hino 80 por Cristo Resgatado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e21f0060279c9027f58e31b042946d6297d2bcd5aae917fd2cf5c5eef55618. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTPX2499299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10f8485d84b63423da7574c33fb24d288553a278c75a47bf8f2cec7acf4775f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTPX2499262.
Tocata Sax Barítono - Hino 473 Forasteiro Sou no Mundo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46cd7235c035db88828e88d821021ab1fe99857e5c74190e02c30c6b65adf12. 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/QZTPX2499329.
Tocata Sax Barítono - Hino 423 Só o Sangue Precioso e Expiador
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9bf0bf8341c00b1eeeffa1a9e44e97354ec3c03e17e154f155f9e99c322c17. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTPX2499141.
Tocata Sax Barítono - Hino 127 Meu Bom Jesus , Contigo Almejo Estar
Sax Barítono - Hino 204 Só Jesus É Amigo Verdadeiro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe821bdd75cdc66971d813451cf8b1e00b37a1e7183c32463478b19e71313755e. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZW9K2411577.
Tocata Sax Barítono - Hino 147 É Bom Louvar ao Criador
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49ac49e9823b1e62a281745ee4587a624db43290505cba0449e08a13fefc584. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9K2411691.
Tocata Sax Barítono - Hino 243 É Jesus o Nosso Intercessor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04db6296711ba7cde92787ea7941559aca7a6e070c05bd3df00825ea8b0b9841. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZW9K2411599.
Quarteto de Saxofones - Hino 35 Eis Que Multidão Mui Grande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53b85b2cec027ee49a7f950a962a6023c229ff05f4836e101330715b56be059. 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/QZW9K2479574.
Sax Barítono - Hino 114 Clama ao Mestre Cristo Jesus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d661e16dd0cac69b8f0dbeaf792d4556bd491619e945570e654178576f734f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZW9K2480405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8b28ec8768414cf36d04a22ebca4c540670acb786b81b5e9b917500f754455. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZW9K2479585.
Tocata Sax Barítono - Hino 378 Grandioso És Tu
Tocata Sax Barítono - Entradinha Hino 79
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb549178ff2a9b00c3336e8930d058365e5a81028e0a0b934001d8e88747e8f6b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZW9M2440225.