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 0x57e09da35da40afe33b0ecbc8b3c2baa1038ebc157de476b3428f6ab57c9b3b9. 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/337953c7-22f6-4795-a594-f47c3193395b.json and https://artists.proofprofile.net/proofs/artist/337953c7-22f6-4795-a594-f47c3193395b.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 0xeb07c13e0bad5df1fe5b6e178c5e2429360bf2a803b01c4a3060f109a919769d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/NL5UZ2406405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d8302f57c7bf7c9394cbb262fdb2b84ff764879058ba392c7e84ca5d3be7c2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NL5UZ2406411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed6b1d208aa178e70b71ff0d582e0b1d36460ad08939a3376ce52ab6b248fb6. 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/NL5UZ2406413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddfc3f11a2058015a62f1f4b9a0f82e78053479022d3f13fbcd565f5341518f. 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/NL5UZ2406415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a9e4bb3454dc025f892b2397b8881e26733f73599bd1f7d6996446ce471d01. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:46:24Z), 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/NL5UZ2406417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb07c13e0bad5df1fe5b6e178c5e2429360bf2a803b01c4a3060f109a919769d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:32:25Z), 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/NL5UZ2406405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85bde06d2c6cc7ca7c84cc36806dae340aa015f8d700b5f5ea07133ef4c9022. 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/NL5UZ2406407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a242ef1537fdbe7b6ec78f15756fd4c02c52d4315ed0d96bb30cb0c6b92489a. 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/NL5UZ2406409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c36afa568f6cb6d3e58628ac2b0e3a66482c4f225b46994b40a24939be9d248. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NL5UZ2406410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddfc3f11a2058015a62f1f4b9a0f82e78053479022d3f13fbcd565f5341518f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NL5UZ2406415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166c0c4b45d438f550aadd1ff763855411a40ca5d4cec4454fc9a8c8b8ea56f0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NL5UZ2406416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a9e4bb3454dc025f892b2397b8881e26733f73599bd1f7d6996446ce471d01. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/NL5UZ2406417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ac35bfe6620426792ec376edb584d193b7edd0a45b2816f24b6460faf8441d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NL5UZ2407278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d663fa00935c7569fa89c9f164c6abc1461e661bc86f26b9a39211c84314f2f. 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/NL5UZ2407279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ad115c0ab6f2e1f7227e46332d009925b55fc67e4df0f2cf08f4078260cd0d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NL5UZ2407283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea4807423451b53cda7a10c28b58ceebc21e4cdd32e88ddbec1cef75c89d41b. 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/NL5UZ2407286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ac35bfe6620426792ec376edb584d193b7edd0a45b2816f24b6460faf8441d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:15Z), 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/NL5UZ2407278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ad115c0ab6f2e1f7227e46332d009925b55fc67e4df0f2cf08f4078260cd0d. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/NL5UZ2407283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741333ef29e7de4fb2b3dcf9940f31714d0b644f5ac961e856c462b4788ccd74. 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/NL5UZ2407284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea4807423451b53cda7a10c28b58ceebc21e4cdd32e88ddbec1cef75c89d41b. 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/NL5UZ2407286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1673c4119699cf35258542b85079f882f50b50d19b80d95a5ad6ef5bcd54b9c5. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/NL5UZ2407751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f3982158849d908f4ec6fdb030568989f9b752457967348e5740543c308a21. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/NL5UZ2407756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5476d345401b5ce5b1e212438229c75f05538862c6b0efbcb9fdad004de3a23c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL5UZ2407758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e34a98618a26790b8cd6bb1885cacb730142a654bc8e7428a6b7697dd084ddf. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NL5UZ2407760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f25c6b2c5436c1f7eb054693121c4f45cbb1bf54078248ed98f5b4e205570f. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/NL5UZ2407762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52192d4779b3c7c76deed3e6a4f768a1e7fc51bc96a948014cbdc906fd0c7212. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/NL5UZ2407765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef205754b518bd5b0396ec45fd30d0623121570877d883d1d3d94c21653687c5. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:35:22Z), 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/NL5UZ2407766.