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 0xd80955965680b4e215871a479a9ed87e0fa9956c854202a936ea3687b64587c3. 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/932960dd-8f24-4582-b9f4-70bd57b91c1c.json and https://artists.proofprofile.net/proofs/artist/932960dd-8f24-4582-b9f4-70bd57b91c1c.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 0x5d14808577a15cbe44cf7b1d9e1b4f1d4586d8acaa2b330cf57918a5f2ec3a0a. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZHN92469971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2112499f2bbfb1ad276557714ee0c046f6b14e9d87a79a28a956a3241d467ed. 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/QZHNB2472120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2911620b8059a1277a365d846c7fce5f93f6dc2992ba35d7a079242a3f3bf9. 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/QZES52267781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78937bd2ecc520784cdbe5fccfcf65a1d1b6bb85d4c64d1fd3efc14a83270a4c. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QZFZ32472121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8757a745d11f83c5055d72d9da829e16a751c65b93412f0a94452bc4d22038c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZHNB2473226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb626830bf93eed3131b7570242feb594cc71d3a537619dc408fae42967f41c8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2449143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eee779e53129d11ccd6448afb5f8c0bd0f9d28e96d26e8755d4d21f090a56a. 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/QZES92299384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7673a6e571421f34ab19ce19c7485c524603ad013221e803f01bb97bc37e63a2. 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/QZHN32202027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2211d0aeb548e32162f096c23360b09979e6c35f067f7e63a82168a76c49cb7c. 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/QZFYY2297456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778d2f150629b8ca8880614faace660aa93907616e165bf8c707e8f60138700f. 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/QZHNB2478399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7f30f9d86ab4108eec012332d969fc22a24cc6a08b72c447bece2c464fb966. 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/QZHNA2481283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45cc1fd0c000b52fb490ff0f1cb00bb7d357eb9ef0b7a315839e9ef518f4f32. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHNA2479988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b1dadc864251abdc202187232dbb656e54d4332d1c1905e131d3b1f9fc67cf. 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/QZK6G2335465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bfb221ba2dc69be57be1c7af352bf6a56d7dc4b983999be8c15bede8eeb4f7. 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/QZK6F2413254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2fb6935c3f33432952fad8289133c71dda9b9058220f50b2b2366f0b00a919. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZHNA2418526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff410e8e145f1d54adea7a74c7383016acd4cc7cc855acccf361f528552668d8. 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/QZHN52495751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3123458fb5ca7befc8dc3356d36cdbdc579f3e0197b0e32b8ffbc56893ad8389. 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/QZWFK2372292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776da4549f1d1e4a0b2958c38dceb9c8160d1c78b66707da695ee72f6494ce0c. 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/QZFZ72344092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8afdf9fb074d45465bc64de11f598b483376d396ef6191b831f1411f31c2b8. 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/QZWFQ2373655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd3fd2b0a5c131f54a2bfba9211ed01fe65d6749141f1034da9a07806528454. 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/QZTAS2213986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bce300bb5a40cd9fda18e494982f6045d02df00521d6e18f24bd90c98dafe9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES92391487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8112c2c6270dea2e23a57bfe7a1e386b34b778758f3118cd710ba160caf0ab. 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/QZTAS2292086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0033c5141a8d4e6251a080871fff53dcf37c890337def637d5b8c44e2dab4b0. 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/QZPLR2256548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3750ff12629d42ddde401a0e0b84de452e6cf215d539a102c98a8295a60bdb11. 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/QZNWQ2213607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5149c744f7b7b302a8d596c60c564120624c3cd1145fba3348bcfb03983b81. 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/QZMEQ2241766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c0d4ea883f412b129456c6226e294e52c33941a5ba70a8d67d485970919d87. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZK6F2242177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72febf6fe692ee397d7e2a52d78522d48582c374e7f22a94ba4e469791949fa. 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/QZK6L2289971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aff36d6bd41d81f5f3fc4fa1b2a56660e05b6d9053bf0ff61e19fcf7f07ec32. 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/QZHNC2236972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0586561ce8a5c25903570ad59dc0c82442990c499bf2e0df8edfd3366313f26b. 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/QZHN32281613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae4ea126d4a5e7cbea367d4d00a1d153ec677e81aad019b6aa7d2f3d53e59c3. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZHN82213384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e0d77c175076fa376cc35e775ff86d0469d286c7a039445cd2c2ad47ff92cc. 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/QZES92298255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0788a1a58cce8f6e8dc3c9e9699f3b319c6f32e6803cebfa93d8f1c53c2e3a64. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES52281919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec869fc87db1c7e0670232c33389f7531f7d0ca67d6adfe8e6fccb8b5edca579. 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/QZES52281288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f120b05720c04898dc9e009d3e6e7002b2f378b83c46e86dd797bb640cf7be3. 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/QZES52259714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794f89decc05914bbb49cb7c8501edc8b78e5333170c848178f79840e53f9502. 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/QZES52260911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8e0c5306aabdf00297fc68c41ae6884c4e4779676c6a86fa4a8ab330b58da6. 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/QZDA62217071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5761a3b289a0c6df2af322546f055890659ece558dccaf1a80bb1d6e074b41. 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/QZFYY2297458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c82c82220a7cc375ca4ddb2cfa5045befa6a616ced8ac386d52dbaf311a247. 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/QZFYY2297457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a9bf542980eddc0cb2aa9808210da99b383692e270e7793f863cac75ca00d1. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBLFP2463735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd436773d443b78935da96967239b63b12b0df8de9b9413becafb0a8556d7c0b. 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/QZHNC2428352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce98f3acb3252f60568bb6d574d37003c38ee744ff1199ead4810b4642b22e8d. 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/QZK6K2577507.