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 0x922ecb02f2807ddcbd762f7ba844b9cbfb39096279befd5dc7f33462dacae7f4. 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/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 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 0xea851566fefe200fc814154816293bc7465410f98d3f0ae7a79cfc6574ffc930. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZTV32416358.
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 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/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 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/GBRKQ2436442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847223135af107ca58a20dcd27aa6a9dc0772af375d751f01b6e3e81a8e4079b. 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/USLZJ2433675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62601d9a7b24fe624fce68b8506679e69ba6322b2366bfbce09ce586ce96a9a. 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/QZ5FN2494391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc728fadf4724e3ada20aa64f2954e2fc1105e2653593e00ed1299c6cdf1c8e3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZWDE2218596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ee7ec9426956c3e4b80a131eb199de968cd0f418f3a70b193c7c912e0d7fab. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZ5FN2428724.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890c0ad8876b6348aa7f436013c4d0a1570809bb1bad675a18633567c35f186c. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZTV32321888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4580788b20e5ddb6758f276b5496d3ad84f82672bac37241e9b2c1a4d454bd07. 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/QZZ8A2351191.
I Am El Negro: Fama y Respeto, Capitulo 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868cd1cd18661d2a38ded70c21906519ece56176f499f741f4b75cdd1c568c0d. 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/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 0x591929475cf6bf9491fd709d261c6707f421adba4e326d67da77dfcf64508cc2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTV32384380.
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 0xed3a0c438ca59dcaeaf65e52480f90bc94e40379adbf8f729a6875cc23968d23. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTV32317571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721ad025e7d5b191765ffd3844753322b3b4b6349f8ed63b687c4e80d3ae18dc. 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/QZTV32317724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888c7c3f03abda46b818d63f567061d9b15f592564df153f027acf527c3b89dc. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZTV32317704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9b2c3a2ec7839619061951cfa1e3c8efbf09fdbd254312c374a2b37404de92. 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/QZTV32314241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1748b4bd1bcb6a702faf930d72cd2aa4233ce1416ab1bf6e4fa0f6fb7b444b. 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/QZTLA2369698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a38cc30ac87b374863df44c693abc97f2964ee334507347a9c45ca1b5e1d21. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZNWW2344710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f9bba619cd069ef8f5b864a2148b58cf3d4aba4f0676b0b78b294a4bad44ae. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTV32317760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b747ec0ff4f877ee7fd9eff73b8671609f7baa658a7a28b84849f9b93d4309. 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/QZTRX2320827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a2efa50b077c6df35892e36a976b30f93852475b5254c5e8dd22f61e236399. 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/GBRKQ2357854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220bee4bf03b939f165ef1e618e61449c6a92c8be00de529a79a16f6971768de. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USLZJ2366684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f265bea1ef94555f90be0db8470b288d6c038cc2d8bba6af1454f3aabb5b0ad. 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/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 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/QZ5FN2368075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaacd70cc50dffeca6a35b1fd08636e14c318baeace8c48cd0938da5c93b9f7e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZFYY2303259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c7405040bce692588cde5532f789d89a846dbda0fb3dae27f3a875b5a55c26. 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/QMFMF2232701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91150b9179df2c2fb4a9cc07cdcf4cb28d6f8f022baae492e63e5020a9da5b3f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNW72212726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54485ff02ac28bbdf1423d5540a9129ee92dc4595620338495a7693c0b2d72b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTB22259069.