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 0x38ca7d96df30ea5c7047831ceb31eaa25ecaa5e2e5eb1dd36ee205435e843cf9. 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/459f0fcd-abaa-4240-b877-78f78329a304.json and https://artists.proofprofile.net/proofs/artist/459f0fcd-abaa-4240-b877-78f78329a304.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 0x74d2b14c1ba179f6c9730c19390241e9f32c365388ad3de87f09b2b330e9f1c6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:39:44Z), 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/DEBL60929269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8cbcd6a7b3f8b10c2ce286b305bf24041cc11b68ae7cd8b35956b470995a21. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEBL60929271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8227442360159c20e710c65ff7000f42d327c6e11eb3761298cc1d582ddb161. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEBL60929273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfe18c2c95db0204aa8542fa3c219344142439ebd05abcaf7d54beaa9c79307. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEBL60929274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d0d456febe18da02584f374450a3e9bcb81bde1fc8029d96bb01ebe115882b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEBL60929275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dbdc8f652a25e010694519b40eabe41860adad2350df9430fdec4a29c81d40. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEBL60929276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57664e78b5168765f4a6c95fa81999ed35f6aa5c5483e62d1d50d7fb0433dddf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEBL60929279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90faa43f8c2aac8092c8405051cf55e6cdded09f8633c075feed369aeb1f217. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEBL60929280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e8e48250f211b3763aebfabadf07c195196a6dd15d6f73c12b60040e4a78cf. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR0U91701487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e16664349ed7d21cfd1f3c6adae362edf8c95ed7a0f2e938c69f7f38f8f9f01. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR0U91701488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8676fa5b1cb1e3d6933292d8d9d2cf468c865223794f5b306c448dd1feef4e0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR0U91701492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d397ed6322b05995fc86d55e85bf47bca456b66fbcb079a9b35cdfc39c127a7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:11:00Z), 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/FR9W12333618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8e380df7d927675f228ab0a9ab7d6e1b9ec82ddad283f6100f449f32ad6839. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FR9W12333629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd746d0c1aa608a7ec079cf0d9cda1c6229ed3a095bce28a0570d0bcc18cadf. 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/US6QR2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd746d0c1aa608a7ec079cf0d9cda1c6229ed3a095bce28a0570d0bcc18cadf. 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/US6QR2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8af3be3ce55a70ce0d11ac6792a2d5e814598130675c0324d454726b1cc4bc3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FROU91202683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d303c826baede294550a96bcc324c206a8005ee4d5bcde0e3be89fac3cf40b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRIDO2010578.