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 0x3e2c437f7e288f92fce2118253a9cb9fbfb7e9064729be31f5fe3f7accae0924. 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/6c142c28-4be9-4b12-8208-e3e2cbf8f411.json and https://artists.proofprofile.net/proofs/artist/6c142c28-4be9-4b12-8208-e3e2cbf8f411.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 0x8874fd2bda53ff6bfb2e05f491a5b252cd11d64f7f4365b92aa942b6fecaecbf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BX0BA2200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fa12ee3db80d940bff06070a75319345a4e9c86afc7cdca6d1bb33a41aa6e7. 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/BC62N2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc79ae1f8573889a8bde7db67b78c9840eb2167e1050689ae9178065690034f. 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/BC62N2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc553fecde9a4551929681d1a869e94d1bc868d51cb837b1445f42b58ba900a7b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/UKLVE2301433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38fd0842b89fdc5fae1d880634ffc4a90f821c415689a488495f171b16da597. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BC62N2300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebc04554c4c4902bdbee43a86e7eb7acd15b6b0e6b730e462238129af121ca8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BC62N2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5c7c4e185403f14d18e773450b66889a104421260819772a615d00c1bb65fd. 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/BC62N2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905e731875964672151e12fd88480e81d76289d0f00ce1fc2da27c6ff4891cab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BC62N2300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5c7c4e185403f14d18e773450b66889a104421260819772a615d00c1bb65fd. 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/BC62N2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca6a7cb07c0238fb3a78e72b04a79d1b008adacf80160b4e412c313bc252cda. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:13:07Z), 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/BC62N2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38fd0842b89fdc5fae1d880634ffc4a90f821c415689a488495f171b16da597. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/BC62N2300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09224728f667be04b9706d41cc6b1eeb2413460b0ff62d54a2218ccd74dbc13e. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:43:49Z), 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/BXBK62400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4a125ba52d27c93bb738bae30ab4f683ea5492aa4f9c71981724a83187947d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:18:39Z), 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/GBKQU2478917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8937320d93566ced7200d8d895b12492c0ed0873ff7a670ed058b9eed435ae5d. 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/NLMT42401506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c600daf2bd104b734e2a51916c809f0b69471bc608fca2c03849b659579347. 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/BC62N2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34606474ae25bec4ead09f0eeb1cfa3e51cb9b32b4d643cf29fad966e846926e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BC62N2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62973a9dfc2e61faab91c8e9dcc9a488fb4fd630f808c2eed7e5ce46cc60b55. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWV32596392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3aa56acc702d2f8a77c24e5bffbb35fffd6b1eb309986c6d9c23281080335d. 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/QZWV32596397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a015845f8dff93e28545dcb4939f1f1efe211e2e35b5c4eefec82d2fa36e244. 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/NLRD52350392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b81325a2d93d4bbd2362798048066f81497e455da741fd04c17aad568106dd. 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/BRYVQ2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d2760664e3e9f1f6bd9dd229551da941ef413c3702f80250dbc74511cfef36. 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/DEBE72300838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415362bdb533cdf77dd407a927f9665ca8312a51fbde28bb3fc5d7dee686e836. 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/BX0BA2200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0e41a5062e1cbb61285f8cfc791a74ab6b3d1064c8efed0939a9062ff4602c. 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/SE4MF2500684.