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 0xcbbf4e51f681e2f21f9e906150eaf611f381bcd7932e34d880f60278f3bda29e. 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/5efaea9d-99e9-48aa-ab40-75913fa3f399.json and https://artists.proofprofile.net/proofs/artist/5efaea9d-99e9-48aa-ab40-75913fa3f399.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 0x48a357c29db893e29140f2b8252d1fdd19b71017f691ec9bef7d11fc434205cf. 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/ESA112433638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb16478502cfb63c4c3d9b713a7fe1c272c9f2da18eb0614eee1bf5af0816f89. 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/ESA112433683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da5c7c8817dd43b7c7bbaa553952d40a5f23649da4446f01ee6d777b842f296. 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/ESA112433650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafc09eb80185b5b6a540d82ae99f6ab23fe58e6d1851f2cff56b33ef91462c6. 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/ESA112433649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49f841c4c16ef274426ef7e0599204b3c683ebe9eff98e7b8d33282dfb2ef68. 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/ESA112429449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51eb151e2d5cf7ac9e3b1686c32a5c0820f93ab9527a59cfcc751c37954c1d8. 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/QZS632487545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03740397546520baede2b4539a7101f545c5b14392c6c6b4399376bd67ec7836. 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/QZS632460580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f446fdc3d58dba472dc2274b98a0c2e67bb98dd3f0cede456f943b2a3a65639. 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/QZS672415912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957c2e63bb0cc91a5800e7d819dbe3ccef1f5a61b3e44eaba2ac616474f5d78a. 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/QMFMG2367734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a754cc828b47e68dc10dab7e668c1db1c21dc017f9ce90befc484620ad099d. 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/ESA112430101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6474ad48d208c27744d1db86b0d3d67493d9fe09387e3f06335233db8cfd91a2. 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/ESA112313182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a10cdce5d4cc2640e151821aece0b329b11e93425cfba1989c9287062cb443c. 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/QMFMG2367746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d1010c308cb5c2ea4ecfc59b166229d3c63a9d974ec1f1a7ff804661bc47f9. 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/QMFMG2367753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e699b7aadf6d97f68e862aa03731883b38b9e0f680fe3b5d60461c02e23dde. 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/QMFMG2367732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c1ad9ec1375063b292f913f91a7007de524159a03b46af3d9c37339a0387a0. 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/QMFMG2367736.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e33e0aaafec1180ae03cc9f548eabb98bf16172b97eaee1a56970adb0256cc. 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/QMFMG2367744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb549e2a324f36e645935c0fde23170020b75c06aeaf9e5989e1a4ef42632888c. 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/QMFMG2367745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111bac15a5edf215e0b37440426bd1d350858062983cc0d405faf5d787ebbc7a. 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/QMFMG2367733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22c811635199d02c07c79ed570023071e7c24be5357a7d231ddcf46d6668421. 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/QMFMG2367752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedcf87361a8c58dbd161ab89d6aee20f0c398723528528cd508562396439a31. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QMFMG2367750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bba18c3d96408a66d75cbe6bbbeea6f48f7270fd3f7d9097c4bbabb98d0f5ba. 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/QMFMG2367738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b7102ab40da59caedb6951afbe1c28ead1dc5f078015808270e8b4686a30c6. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QMFMG2367742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67515e5cf47f3158c4e236c5119c6ce43829545538cd0e959d60ce26d07caead. 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/QMFMG2367751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eb41a1c61037c7ae0f2770cbd69c6ab176952e3643a5b313bc15414dc9ff56. 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/QMFMG2367741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9668c713286b920f3cb4dbc588d7aad8ff8b674b2adb31fa6e0eca9f74937d74. 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/QMFMG2367735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302f2eccaf3b4f66de33b4b92754a01a85bfba79e70eb3d70f6f9c6222f47194. 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/QMFMG2367749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f26f6efcf4603706fef8a78fa3a49572d26e5d56bd0d74b862a897d7fe1f6f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMFMG2367737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1dd915a01ab834cc86e81bec6d688f9bf63a67738ec74c6d02f2d461991b4d. 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/QMFMG2367748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957c2e63bb0cc91a5800e7d819dbe3ccef1f5a61b3e44eaba2ac616474f5d78a. 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/QMFMG2367734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937e77c0682deb866318c3b656a630cdde0fed05a143c361079cd0bc0d46e62a. 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/QMFMG2367740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a2a94fad07f9c6b2e20cc2754e5192dd8e0854ab9749afd136a2b123241a74. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QMFMG2367739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d5a66500b50de93be89340dd27674cfa5fc00ddebba43bffad68f7b3bbcd39. 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/NLRD52253358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c186f29340acfabb77065e235c459f2d91ba61b68f54d05fa8fa81a03a9c7c. 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/QZZ8A2407206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaeafca64f32d543be92bb46cf08d9760eb08dd1e58db22852a6bf164c395198. 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/QZZ8A2430584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2088645e6530b1ab673d863b374efa38cb0bfa26c0c5ea0d365baa80523b4ca. 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/QZZ8A2407303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd3f0725971e56b63fefa9b7ea6b1ed8d9e077ce8f1424a095f62db41f53ee7. 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/QZZ8A2430594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311a566385d39fa8658580008e95ad61514f5ae0591b7c1f70ef6bfae8f00f50. 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/AEA3A2391220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f8663602d37ac9eedbd7d3c8a21cc14116a46cecd5cb0379e903d390627c1. 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/BKNU22500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166ce07ac3bb8d9b2d564001ceaeb223eca0b29b77cfb9e2130b9dae12800028. 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/QZNJZ2422834.