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 0x2ec75186f1caa9644838c749edfdd078cee8fb3b6bf1daa1d26d31c607f8ff95. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3547d21-9c96-4cb4-9a3e-1978aabe59d0.json and https://artists.proofprofile.net/proofs/artist/d3547d21-9c96-4cb4-9a3e-1978aabe59d0.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 0x688502a58c0991b5b24d266ab4e0eb3696b7dce10e72fb2d9c4030479d5522d1. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMEN2293044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0c1232615116943fe1637f056cbff2938e47ec7702fe64aaf2104a998786c1. 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/QZTAS2270516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d5061cebc4ddb04450b0940a9028f642f04cbb2c6872fc4e38a1344635e80f. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZTAS2270518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a30d6b99fd4a44b52b1f91b69473abfd05b41b20421cb8308eec735497ff63. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZNWY2304340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e0366dae8bc5e486bc4ceea081e53886a3919270b3a0f37073d4517556abdb. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QM8DG2330044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276c31285d8fc03e6a2d18944b66f471a3c8574a1bb92a9a0df32f51f02d31c7. 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/QZKDK2386454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9fe5f579de199a3bc5698dfbac57cf64cb636c8400251faf37e8c1cce81455. 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/QZWFE2399259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382ca160ddd54be08de49b21d7e1a1f2f0c986c41f1d2de7c30ccfcfebec6d67. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFE2399260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb729a73bc259267b8cec9ed8cb73745357f7c9f0abeb804305be95034e806ee6. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZWFE2399261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddddd6abd514821c6a9637f915598de0d80ed10e7a2e974911b97b56e2692ef9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN82422525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836166c3bd882ba44fca377a73bc9c3c49ab704c9b1e11e0976e788e4a7cfd40. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN82422526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3be1b0df33583a72778cc316f499d1e2092c85c762035147e4f87c1202b94e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHN82422527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a300965329fdfa7b24f40b11f79ceb57a2eabe096ef78eb7a15acd9eb9d2d1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM8DG2448527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b76ba6d94f048c47ab688708fffa7ae7431ad2ff194fb84fb4c703b3a454f4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM8DG2419105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a7349df15ee2ced41dbf5a6b74ef09113154bea2153e9fe1f671b72a5385b1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBD2493556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588b4ec657c46c05f1610e0d28fecd8f487aca570ab28dff64db78d2fc859ffc. 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/QZTBD2493558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad963c685fc6f52d4182b88a2ea7daf0d91bb89b79770da109c3b81b22c1059. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZWFN2448238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9009f0ad73958e506987d0ac02f0465a79210b34c8c15e73e4b091cab1092057. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ782499696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1899e4bbabf505e4abfcbd2728d8306c8ccd94b0d30e3d8652a18a21ce7b6ec4. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZZ7M2418835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a4db3080c3d427604c7b12941dfa1ee01c8404e8e29b922d0064c36fd60efe. 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/QZZ7M2418837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9009f0ad73958e506987d0ac02f0465a79210b34c8c15e73e4b091cab1092057. 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/QZZ782499696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb264603c153b2678f61b5d72bbfc96450d3fcfba17bed3833de1de5fc7ca6eb9. 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/QZZ7L2479029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513d486ee90b3e20faee39d021f2d0116336b34397956299306d1fa24dc5b0af. 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/QZZ7L2480665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccdbdb65f05a6eae37b0e01d08f57832c3c27d3540c79119547d4656dc91e28. 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/QZZ7M2477042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb583dd6e31f93fbee2ef9aac7373553e73f9c05ee399da514d617b733d130047. 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/QZZ7M2477043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513d486ee90b3e20faee39d021f2d0116336b34397956299306d1fa24dc5b0af. 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/QZZ7L2480665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7147f48e176e55382fa430e5592d4181684f3ad3e05c355bdab451763cdc3c5b. 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/QZZ7L2478965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb264603c153b2678f61b5d72bbfc96450d3fcfba17bed3833de1de5fc7ca6eb9. 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/QZZ7L2479029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a29cfebf7dc050841c2e5779a4b1a408124ab6e4e5213bf362575c8de22b960. 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/QZZ7M2477044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500df0c660d36b46fb41bb89a616b214c9fe3d781f053a98c81daeab853c0529. 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/QZZ7M2477045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93473172d23892cf2fe335860e6b2b6ca9630b3824e932f4db2feea30c02744b. 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/QZZ7M2477046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086f46844b1f43b075213ee11fd310d984d5af9f1c775b4ffec91a5544f95271. 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/QZZ7M2477047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e8de66e5f2c058fff0bf3043eb293e8ee4bcaa6d064561c41fe43b51047e38. 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/QZZ7M2477048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385c1e07a40e85027b0a7746f1b60c904df5cb5ccbb0ec77044b919ffa9e8e6b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZZ7M2477049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99d1e5918ef4151539baeb4bb5b23ef9fd1b623104aeb3750526b4b69fb7d0c. 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/QZZ7M2477050.