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 0x723c9e6842886cd034799dd7ad51c58e2235e73a00319eca7586a9baeddbea44. 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/e63cc4c2-fc6c-4351-93f2-d095acaddb4e.json and https://artists.proofprofile.net/proofs/artist/e63cc4c2-fc6c-4351-93f2-d095acaddb4e.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 0x73c96ee7c1c33c50bde316fcc65913d5bb2f790f172f09a9df21c19d0a3d7471. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:50:26Z), 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/QZNWY2180229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69ea0d124437d46bc1f0786672cc472eb12f9c11a35d793756de23df753f3eb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWZ2192537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8342c4980ebf0b66ed5273cd7600f1ef201f8773e6e2350bc9789729036dc003. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZDA42229783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b5e65713f9868653655bf62bb8a284c5eb48f52a32f9bb4b9e2a3fb4c36d77. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZDA72221000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f2e1da1056b0d8328f1f48626a141475e004e213405e07f4aa64fc6d7b0d21. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZDA62298113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01102e284e8aa11e8551d3b9c4d18e7092137dd509f503695b7f11c07dc861f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:23:29Z), 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/QZES72285391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d27f709f3fe6a0e73668acc44eb174c0e3820b85bb58277563297f62af8f1ca. 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/QZES92267280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e353ff71c79b214e5e31eb0f5a3ac3ccb2b141536f3655896de34a677089361. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNA2205086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d27f709f3fe6a0e73668acc44eb174c0e3820b85bb58277563297f62af8f1ca. 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/QZES92267280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec05a64c9a832ec2a565073a26b743f7babff42a44568e3f7cb1eee91711704b. 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/QZK6L2247133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57966b7ebf01b4eee4440507887b471bfc4b55200faaa5df6bb031dce3ad8a96. 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/QZK6L2247134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cefeba4de78b200ab4c60087551284425b4990301ca56aa693294a6c3c0df02. 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/QZK6L2247135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1e4556c064bea29c5af07677028e3c821ce18dcb20f2a1566918a91744169e. 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/QZK6L2247136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc48485817964d507d2db5dab59a276b866c0e07e273fb3c7b751af303e2582a. 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/QZTAY2253555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0b774362535b6d73286e41b1f1df8cf0e927463a1f06e6a0ae1aece48e0237. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB92231798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4008b856723d1904e079c87427378fa95024b61ce39af5f770165acc479d185c. 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/QZHN92317991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16245352bcc18f481562731e439401c0a0f563a38b899603241d3c5cc9350c35. 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/DGA0H2316138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283763c2cd7c0fc256f5f513a87788637dca8b590624ab618712b58c6a914f4a. 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/FR10S2460042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b6b76cba67e9b646a250ea584296f61ec0b816ac0b73b2983074edc38aa9b2. 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/FR96X2484498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e34631ff0e0cc9e9f8447255eb8e2845a1c11736034740c82655a7f0f4930d. 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/FRX872448240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4a56b829301e454df46de3201026a5610a8d71f3f7c5515022af92e66704c1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFT2474232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef828bb429e7f32fc5704ea3e3c22f0bd216e4d1a7bc93eb7d0bd6c2a38c153. 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/DGA0S2421335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d785fa2f2f8f9f2e01b24168bad5dcebd04138da3006710b67e53edb4910a6e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/US7VG2528182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ea30231e35557a05b9575bb918ebb6fcb4d1bcb36be950d5c378acf5b06882. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZMEQ2544338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970dd12694b7b3695e8f517c16fbe058e048bc859ccf37fcdc678399f581db72. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZRP52541473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769b40a22ce7267abdd97b72fcbeef3dd392a6591fff47f730341eb4688775f7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFM2563006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c1476086fa09e81e80dfd8515e984afb8e8dc0864533c8c49f67658286c13a. 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/USDXS2201483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ecebeb5cd088fa90ff6aabb91ad60a98a93934e713080459ba6571198c8459. 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/USCGH2547068.