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 0xac2359f49b2fb0531e571ecc930205fa52e3acd75eab85de17d37de5617be4d3. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e7281e2-3a3d-4b03-bb84-0477f4bb88e6.json and https://artists.proofprofile.net/proofs/artist/7e7281e2-3a3d-4b03-bb84-0477f4bb88e6.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 0x98b889cadbf5a7bca20ac4409ed5f8ab6b3cc5365313781a900eb4f60c45a232. 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/BRMCA0000425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc643c83139f2a516cd41fb90f495cd223123560346612d556543f420c12c46f2. 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/BRMCA0000414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2ff7ad8e30d7c338b5cbcbe284b0936f7b5bec52592cc354bbf2c9c945f7a9. 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/BRMCA0000421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a858948c0b779c5d83acf51a0aae99134104da62233d19b2909d578a613e14. 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/BRMCA0000422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c2dae16434b9d9d457076834eca4bd23a575cab685f355d3de304a92f3d6a3. 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/BRMCA0000413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4d6ff27d6ebfdcb30b6491fb2d085099fc7abcd8715414173cb60b8910c1ed. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/BRMCA0000415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99eda242d153bbcbba3922034bd83c68213b856d1e96bbcd63fad42ebd05a4d0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BRMCA0000416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaac22f15f7dd421b173586d65ebdd90fe5d75cedeb3d29d1e68efb23a4d6e6. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BRMCA0000423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8b80f24de784e2270270bb64429f4f99d744770e63a468cbd68976c7417d92. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/BRMCA0000417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cc2f178fe5468702c3f1357ad2a9fd3e4945ab99272769584e40883f510b70. 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/BRMCA0000418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa3b893ff3c62ce02647b03cfc173a98cddaa6028feb45837f13f6d3cef727a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BRMCA0000419.
Sem Medo de Amar (Nuvem Negra) - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89066392377aa29bac0631c06e97743b1ae998aa5aceb4920acca88ead30319d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BRMCA0000420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483d2551e26744200c9eb534f425f40e9c960f0c29704588692c2d6561fbd3a3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRMCA0000426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f93a40897b3b037ee8b207d6f3f4199fb53292197608e091143061f45a84077. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRMCA0000424.
Nossa Juventude - Aracajú 2000 [Swingueira das Antigas]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a04b706b4397dfb1209eabd28cec875992425c9f9f44b4fef1daaf87aad2a3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZW9L2203862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9712337689bc5ef049e998b89466dbcdcab5837e44e35370d7409adb67b8b5e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9L2203863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd70fb4f8de573fb26ffb4823b6870077498d238fb609e8c13a3245dfdd51d29. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZW9L2203864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9b4c3ac868d858694dcf35133d5f2c73fd5f46934653195e0b2d9223e987ab. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZW9L2203865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97347d607f47a73a29226484507c6854da3ff5f6e285e6b03f579e71ceb0bb28. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZW9L2203866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987512780735061725731c534efe265c831b7fd32c86fa3a5f3bcf373bed3050. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9L2203867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e554311b13fd055c2fbd32a6e5db885baa6d1316b242f064e03eba34250855a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZW9L2203868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a29c6bf9711fa6f46ad1b4e676a7587f14c14e62ebad50ec4918fa03ec1581. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZW9L2203869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2d8ed6c923122f986c41cdadf004989a339815909071a54d9cb367964c5ab6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9L2203870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829d037f1bd0d86bdcc724afd5c3825c2925d65a23dd705e83f210f67769fec6. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZW9L2203876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33f405e1846f55da617b6df383ef49e0b8580dc7701c92eea3095d088e952ba. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZW9L2203872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366102d52b39e63fae39f3682c52184f460529ab25874f8605e5b7272191b4b7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZW9L2203873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55e8089ec8d244e16d363dfb8e6572ef0a81be5d0b1730309c1aa15f5d12048. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZW9L2203874.
Samba de Roda / Pé de Vaca / Xalálá / Dignow / Tapa na Cara / Aviaozinho / Estica e Puxa / É no Cavaco e na Viola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2bebd7d78cde7835ec6603687a1b56f0a990543af1c9e785ef7045cf12c6a2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZW9L2203875.