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 0x922ecb02f2807ddcbd762f7ba844b9cbfb39096279befd5dc7f33462dacae7f4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29dc76b6-6e84-419b-b696-e11b53207303.json and https://artists.proofprofile.net/proofs/artist/29dc76b6-6e84-419b-b696-e11b53207303.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 0x676571d42f63251aaa9b3799f718693a17b4f65786839d3a6c1bb0f9c22f0154. 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/GBWUL2498006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b980a598a9d4626c80142b3bde6dc771a0e36ea4e73a86e6ee6c2d0f98ca4c. 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/QZTRX2476275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bb8f454ea214ec93509a027d563738904a6b0ad103c270ec5b3b5b4a0aea02. 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/GBWUL2466154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1e6e26c018f3293615c7b68f5ff98bc03b458202179272e111307c17a66ac4. 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/GBRKQ2436442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847223135af107ca58a20dcd27aa6a9dc0772af375d751f01b6e3e81a8e4079b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ2433675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62601d9a7b24fe624fce68b8506679e69ba6322b2366bfbce09ce586ce96a9a. 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/QZ5FN2494391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22540b088ae0a6cedfd87cf1fdb7957e6640c982420edd97a7371ac0ca4bd0de. 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/QZZ8B2396440.
I Am El Negro: Fama y Respeto, Capitulo 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868cd1cd18661d2a38ded70c21906519ece56176f499f741f4b75cdd1c568c0d. 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/QZZ8B2311109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9135f409b82f2fa652ef6992cca90ed0f77a372b35bef8d06a3a468e1d381d3a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZZ8A2351178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390629d6b6b288b68bca5f34496b4641be502465e3c910b5a2e9a3b4880bf813. 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/QZWV32321182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721ad025e7d5b191765ffd3844753322b3b4b6349f8ed63b687c4e80d3ae18dc. 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/QZTV32317724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9b2c3a2ec7839619061951cfa1e3c8efbf09fdbd254312c374a2b37404de92. 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/QZTV32314241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1748b4bd1bcb6a702faf930d72cd2aa4233ce1416ab1bf6e4fa0f6fb7b444b. 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/QZTLA2369698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a2efa50b077c6df35892e36a976b30f93852475b5254c5e8dd22f61e236399. 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/GBRKQ2357854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f265bea1ef94555f90be0db8470b288d6c038cc2d8bba6af1454f3aabb5b0ad. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5FN2374854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3b85a3d8705b01b5df310b30d7801699ccef65938d10da9a97c58f5fe23597. 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/USLZJ2350143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc245042ca643c9a01cd1e7925655e9e227cd1dbf49f0b8dcbb2fd1ce9b71a4. 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/QZNWT2243424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92acbbd5096a9acd9ffc0da667bcb13552ba2ce75f1ec30840d64f86dcc8d20a. 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/QZ5FN2390260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ed9699c340c395d337de91a8a5d5097fe531c75e7365fdbdf15adff4022e84. 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/QZ5FN2368075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c7405040bce692588cde5532f789d89a846dbda0fb3dae27f3a875b5a55c26. 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/QMFMF2232701.