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 0x707fed5790a104a09b6b9fcd4a63df99d8218c881ceb6b8496f89f6887125fd2. 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/9724ee54-19eb-4e9c-8abe-aed91b71f5d2.json and https://artists.proofprofile.net/proofs/artist/9724ee54-19eb-4e9c-8abe-aed91b71f5d2.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 0x28b2c11c6a7f59f881016a87db373c7b6dd3a8bc7d035161949ae4592b48e1ad. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX8LD2287460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da4f3a6127b657f28f1b0c44c1518fd35bd21f0278a51fc3d7e29feb0a2669d. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZNWS2332088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf794bf6258cdd175da4d4bb42322c6f4f38e1374b3aded9e4fa4844504a7754a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US7VG2488237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf794bf6258cdd175da4d4bb42322c6f4f38e1374b3aded9e4fa4844504a7754a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG2488237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850a405e6ce9dba7c020ea3121086e66758736f2fc20e438b09149e25caf347c. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZK6N2435136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56f532034680dbc0a1bda8c232ab4e6c43dca52a52f8f7574d4a5c077c6d4b7. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:00Z), 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/QZNWR2448980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8216bf6db0fb92ad73f772fd1698cc08afbcc1d555daf3c6793d080ed3c974. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTRX2443296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20090f7e33889e4e701b9738a9a9d0ae60dbfbd39f00c0b3c166066981b72708. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZWFL2494713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf14376ecea8ad072cc20d6566973a38e34488416f4507a3e82831911a25fb6. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZZ7N2400533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb119f99c597b3e561f6b0e75950536800d940c658acfbf6f7444851eb91530b1. 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/QZZ7R2467724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb119f99c597b3e561f6b0e75950536800d940c658acfbf6f7444851eb91530b1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:31Z), 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/QZZ7R2467724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fe4fde46691dff08daaed9955fbe1c4ae648ea3525bce3767710a4b1d453cb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:46Z), 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/QT3F32425784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2036a2550135b10197a9136d1508466b180029ff523f042240a3ebefd522a07b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ72563259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9074653afd9b7ab8fceca36f1b5d3b8a0bca95d7a6a90a6a9e94a515069098d9. 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/QZHN52547108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b529d26d55ebf2dae068990781c1333b28381c9f09ab5368fc0bcc373acf3d8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTBD2562540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1880c1a9bc38dc92724544ae6f4f57215f894dc5130e8092a2062568f1e37cc6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GXHAF2519940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5ac450d322fe35075749527474b35b3d1e3d39734be4a8451fe0efee74b41a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZYFZ2517694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d972365379f153cf50f4e8a41f7e83e3b9f7e9ef7a4727ae569480c6841d485. 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/QZZEB2385122.
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 0x5dbad0cd648cd66d23644fa91d414f37b78b7242367f54140e96bffe68cbc219. 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/GBRKQ2411928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d0dd84cedfa4b63f6bcecbb9b9d83513d2d6be0e73355abe8b01662d87ffa0. 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/QMFMF2464794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc2b9c4b01e72a5b888fcbfe343cac0c90b8d1df80395feb984ae303c227d99. 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/GBRKQ2500972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98c4419c9a2071f14b7d6435ef3d807511a1426d41fe9a56bb499310f4f7873. 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/QM4TW2524939.