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 0xe4a7591749766f142bf99d4b1baadc9a93a155de71e5c5faff01e5e94614397b. 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/032cb332-62d4-4909-921f-65e38fe1f31f.json and https://artists.proofprofile.net/proofs/artist/032cb332-62d4-4909-921f-65e38fe1f31f.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 0xd80b1b299afaf8a5bc11888fafd6dc9c4f1b96568568f22e1f416fe6f355f03a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US2S72273003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93108231a3ab732b3117bc3726104f770b8f3ee67274b96c8739b34f9a9e0b46. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US2S72273002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8318a9477f4fce169c3d0a57892bd7796a53518145038549e425b62461cd0b29. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US2S72273007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadf2e2948418982870ebdb699a79b2cca6fbd73ea1a34eda178ffec4901ae68. 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/US2S72273009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6097bcc3384db8f9e1c4b3cf7ccb92a82fb084bebda64d977de2c34335493615. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/US2S72273032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb849542439bf8eaae17fb25fb8348e47e6e32415f818cd4e1f63e2529aebcb05. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:04:07Z), 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/US2S72502002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61144c1bfeecdd36d925a389a4cf908c0dce2b67af6af4431b36c71c2593b425. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/US2S72502006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f8b7d8feddb37b7e932d17918138be545aae3bb681c7ace0a03ba7645fc98e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/US2S72502003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61144c1bfeecdd36d925a389a4cf908c0dce2b67af6af4431b36c71c2593b425. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/US2S72502006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4039ee7fefdbb19bac211789f1f0f934a2e6d07100194e41810b19de2c616bc7. 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/US2S72502001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eef73b77ba6629b355dab0d59b01af77123daa126b52558ee5b5eed8662827e. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/US2S72502004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb508e7a85964226f7c1457d1d09c20595418c45515d434190445be6155d652d. 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/US2S72502005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61144c1bfeecdd36d925a389a4cf908c0dce2b67af6af4431b36c71c2593b425. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:37:31Z), 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/US2S72502006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107912e98233f9f545ff4b36e1117421142a71274d841e209a8ba734f7eec154. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:37Z), 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/US2S72502007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8656acf3204c7d045a71cb967d4991f52154b00e26608be0397382ce4dcf25. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US2S72502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e8833748cbeee59dbd09dc20cfab841d1e4f9a9701c4fd9f0a77c56393fc75. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US2S72502011.