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 0x1686e22ae8665a6ad7c8ce938d2f018ed4099cf2766170a8dd100eb1a1385a4c. 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/b28759e2-5451-4f3d-8359-685dabd408a3.json and https://artists.proofprofile.net/proofs/artist/b28759e2-5451-4f3d-8359-685dabd408a3.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 0xd6209bc4f263352ee71f88aa35a78e941bb26a37d3a6a10caf1b73b876316776. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/SE5752357119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89034b9018d6874209da138da2583881f7dc61da65a10e16b2f96128e18241e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6HN2328649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe176943c8d6e2f46bec04ab4c0b92d803cac8b8eede2b0d433c02d2de9d4e7d0. 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/SE6I32372377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20a9873f77897133f1f194afaf95c37dc4e2456513267fc96a7394226bb4339. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/SE6XW2384221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822a2ce9981bfad48e07b3b442c777b2a5b5ae1d309d0d1a5ac94af4c6143733. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/SE6TI2324262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ab7e2c8ba1646f449ee5f9461e8f2a381815914ccfbe8b1ecc955525c4be08. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6QE2387927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38be1373f79fab7e6eb685715b0e651c8b0b0e608a5ffe361bef22dffcd6c14c. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/SE6SA2301982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb60b0bfc44612cf00b3fea6c2fa6c26be2472784c9e05388e20f179bb71c80f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SE6TI2304095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11588c985870d31f5708b42d4d388864a7c0a6bd1bbc34a846eb36a48c75015. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/SE6A92392027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a07fbae64830786b04243466b26622dcc197f0ff20bbfe98349a9f72d27ab22. 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/SE66N2322815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cf916b47c3bf2d4818b5b66beb105e0db32232ae49d60fb0097c73210d4606. 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/SE5BU2414400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25195ec009e7f250e360601516ce6ed94e019e1a5b564d7ab5bc3e63f708372. 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/SE5BU2414401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933f3689cc68842d4603b560cbdaca9650134a2c2d547803dc40cdcb80d79e83. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5BU2414402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab33de74cb2df3c54b55794f1fbad470ca22d04c213bcb274267914fff94058e. 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/SE5BU2414404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc078756e5902405eef25dd7f4fd161b62d3188a996c3cde293fb1904c9f33c12. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/SE5752488371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aca5bad8d156715a6501dd008be894e533d7e66dbfc106fb026ec5d48d2d48. 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/SE5752488367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa894ef49acbd3d4b52a8f62df6f3a33001c5733831c0954162cc8863159577. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5752488368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e9e8692bc3a8b4f53577ca2e01fda51130e5e350254152a9bdc6d4763c9b7d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/SE5752488369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac177c98bc5f02c296341b02d76fb6b0329dfb4ca65fe860b709c4f14af12e1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/SE5752488370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc078756e5902405eef25dd7f4fd161b62d3188a996c3cde293fb1904c9f33c12. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/SE5752488371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa9627cad3fc4410c92e2d78e4a5082e4ce0461265e07f2853055d0d10358ee. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE6HN2499876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ea5ad06fc50720fc214b7bc27ca988fd408e160f2ce56438fd312f5b023802. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/SE6SA2405833.