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 0xfb651fae02fd0fbaf636aeffbdb56741c6314b2e356e2d3809b35ca75fb535ad. 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/a6a75c36-3d7c-4bb2-a373-32d8d642caea.json and https://artists.proofprofile.net/proofs/artist/a6a75c36-3d7c-4bb2-a373-32d8d642caea.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 0x13e0678d6e2041facda5fc4271bdbab5c7d14024ae21c46b797f1221aa0797ff. 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/BRIVT2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ba26bea9ea3e9d76027e1da0802d2710fcdc3f0b88c7f6740e47cd805996e4. 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/BKPU42200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8328a9025687f326a1daa2951577fdd408fe73737cec5801804286422c89b4. 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/BXSVC2000244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1ef03d0ca35f0e095c208047efe678258819dd5786c811a9cd2e80d2de0371. 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/BXSVC2000248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb6c7e7ff39c7d57df7904cb9cf90b3fcffde218d724f5796f78dc5b58efb8e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:47:37Z), 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/BXSVC2000258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8fd36aa910232ca40572ce2292e59de016076adb2781079e5700c58cb29ab0. 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/BXOGK1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9b7eef675756934d218a9ba5e69a37899a6bc9c92907195a3df6a491bd8ec6. 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/BXOGK2100068.
Fronteiras Imaginárias (Colômbia Brasil)
O Anel - Alaíde Costa Canta José Miguel Wisnik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeeec4f2a8cb71022821638abfce5cf525476fad410e0ef91fd76c058e35569e. 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/BXSVC2000310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453e9cbf4510bec1a0cb5a95eddaa794c6c7c91efbbc891ef4f597333f7a32e7. 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/BXSVC2000304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1e3a171cb6092b1d1113f90bfe6fede6375e5050f1aa4c9542e4b1e0eccc85. 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/BXSVC2000311.
ドルドーニュで暮らす幸せの一日
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c447b70f352e0377e3e21b1131cc3a53dd6d72fa6610ad9127776add309864. 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/QZWFR2476249.
Sergio Reze Falando Música Quarteto - Manhã de Carnaval / Melodia Sentimental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9304d13ef2cdab4736f187f3d7f3d52202ddf214765e0ce77468e33826207b94. 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/BXGTT2400201.
Sergio Reze Falando Música Quarteto - Um Olhar Interior
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab7c26597c6e8cfa33943eb8ae805a27feb0b3b52a2bbea3b1bba40a117269c. 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/BXGTT2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50f146ee2e3fcab0f7e75cd804db0be3c7da4f07b34d10408f1f8251a9a5444. 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/BXGTT2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68307525be5b2613d6df98790c1f751b8204545aee3e6ceebb0fec3ef78f69eb. 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/BXGTT2400026.
Asa Branca / o Trenzinho do Caipira / Lôro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00db2cb96ef5e3232002364d3a791edb5040db29b1698dde2a0c0a86dae60559. 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/BXGTT2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9304d13ef2cdab4736f187f3d7f3d52202ddf214765e0ce77468e33826207b94. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BXGTT2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4409fe9e7aa128af4cad60b6938fa52314095e85e79fc5ede72fe34439763d11. 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/BXGTT2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7894461efa20bf7979bff2572f10fce4ccd9fb9d96203b774b502f55af237a. 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/BXGTT2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f66ea313a78f424298f920439abd46bab074535c0b0b8015bd3e4159a7f03e. 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/QZNWV2537862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c4bd9077f573b97e3bb1f9574d3c9b9f05c64499713b4aaa638a7d4421280f. 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/BRYAN2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fd31e72f0ab30fac2360015d084a44d4db9ddcdfe07db8acc41d426cb00ddb. 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/BRTRB0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd383ce679d10bc471d6df3cab65e44804b5576fc08320a2f43093846a174d028. 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/BRTRB0800014.
A França Além de Ravel e Debussy (Ao Vivo 2009)