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 0xd92b78a5f01b05e97200cc8afa0384548d75c9aa85366576651a80cbf21c44a0. 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/e7ada282-fca1-4445-a82e-f7c7617fc865.json and https://artists.proofprofile.net/proofs/artist/e7ada282-fca1-4445-a82e-f7c7617fc865.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hino 5 (Violão Fingerstyle by Joao Vitor Betiol)
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 0x3394ee563e1e2f0327fd9da72ab55b24bd5cfaddb69fd12f75a7dd402111ee31. 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/GX3Q92335537.
Cantares, Vol.1 (Violão Fingerstyle by João Vitor Betiol)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863c731a795563c5b5ab8efebc1195b2f49b3a6adf027739ead418d3ce24ebb4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GX3Q92366626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52080bd829986437550d2fa9810e5f3cf1467c62650a2fe3c69a6a6e71f7f790. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GX3Q92366627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292f7f85104d4fad4bbfa65e3ef12015d23a905936f35e2d3dd43397a3bc571b. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GX3Q92366628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dac1d25f12c8031725e08c4b8ba7dc869ea356d20299ffb38770581f2d14c83. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GX3Q92366629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1259e0331333092541d6411fc7f6d4d44876b8201c7b64cb3fd7fc7f77e53f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/GX3Q92366630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4a5db6f702eb09e14827cf75f308f64c7f195d71764cb0c0a0608f8035b09c. 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/GX3Q92366631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0095eb672add14942efaefa881ee0d6c00208d6d512fa8dd3df6a9f5b2f85063. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GX3Q92366632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfae29665852c787e54961e9e1887a1eacff6590efa7f8d6637f55d8e1f8bfc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX3Q92366633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881a383fc90fdda03ef7f666da6ffa72f07d735497901fffdc2f50d5365af56a. 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/GX3Q92366634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3cf7dee1726b42298b3dbf32a34f931f88009bc821dab620e73685b2a458a5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX3Q92366635.
Hino 38 - Ó Senhor, É Minha Vida (Violino & Violao)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b34884a9c2f49e4362b6365fd56cf4baf3bffcdb868b68d120b5642c3c8d7f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKXN22318669.
Hino 39 - Eu Desejo, Senhor (Violino & Violao)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9935d7df34424bd2de929ad824321479b0e2d50d284d9cd120d3e13e6ba7e1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/UKXN22318670.
Hino 61 - A Minha Alma Deseja Ver-Te (Violino & Violao)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528d63c0fc296fb3b6479fa7d50ec7162d1c188d96e7868125e2f4bd00189310. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKXN22318671.
Hino 69 - A Família de Jesus (Violino & Violao)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c5b6a18fa635cb19cd125e21cf7423de3838b04b98bc8776dfbce5202d0883. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/UKXN22318672.
Hino 208 - Conserva a Paz, Ó Minha Alma (Violino & Violao)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f5946b1f41d418ec332f6411457813db32b9a22e7881fe1b443440041ec852. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/UKXN22318673.
Hino 321 - Bendito Seja o Deus Vivente (Violino & Violao)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0c7bcc97e78859cf170adda62eeda38b5cfe04a02f93a32a4fa7e2806c690e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/UKXN22318674.
Hino 424 - Ó Jesus, por Nós Morreste (Violino & Violao)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0709b8462e25e695271d7da26b43940a26616e38254cbd3538d55d5c5656c59. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKXN22318675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadba1a7aa1e7d584e1c3885295d5a19223dfb05f706f5bb6c77525a5e84fe0fa. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/UKXN22342787.
Hino 63 - Se vós baterdes, Ele vos abre (Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb604c10a106dd0fbac67a4d3d3c9fba0a54b056f175bb476aab33b9b293946cc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/UKXN22342788.
Hino 118 - Fiel Salvador é Jesus (Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6993c38e5696e73646b8a5b2277bd72897e578056ab72178b3f97f03b2310494. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKXN22342796.
Hino 160 - "Sou o Caminho, a Verdade e a Vida" (Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6217ae0283bdd8305966b6f7cf0df001c6c9432e47b8b1e92de02b1af9bc04. 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/UKXN22342790.
Hino 169 - Aos pés de Deus estamos (Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2bf638eb3f6335628569bbdae5d69c3ae390c39d0aa6294c7902db63552ffd. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/UKXN22342791.
Hino 208 - Conserva a paz, ó minha alma (Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9d860eeaf44f14059e052b7a8a722c83d365c596fd81febe79f82107245671. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/UKXN22342792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8312d69f9f965f6fffb9c4abf884c24a7c0e22bddef0f93b6b35951ec26dac85. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/UKXN22342794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf3958cf9ab3defa4551c936273ff84c82ae94d57c454dfe6e80f4ae953fd0a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/UKXN22342795.
Hino 341 - Com fé espera no Senhor (Violao)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99198d8846c072d628a3bbde16dd1a71a193bb31903fb42498b1004d8bef0c6. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/GBLFP2491914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc79a64356fdf6d6dbc0e5e6e9ad693625dfc04dd8b5e3a22af38a2568a9a103. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2491915.
Hino 106 - Em nome do nosso Redentor (Violao)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fd5c689e0cc10dbea9ef3dd1af3da96426bd010760bbd71eb456814bf8cc1f. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/GBLFP2491916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bea037840d9aa402a8a4b630e326c8a15e6215b02dbfa4bf5277e2709416d2c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBMA22411544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e0fbc2c2ebc46b3cfca37a94215255ff385c5ef38a6459b174f3e8930d69be. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBMA22411550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4723cef3ca0770702c81ecebfff53b0876c8753d1050e486379c7c8eefc2136b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBMA22411553.