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 0x6f96b2ba8119cd54a2298a600b63811ace7ae8a0137130b203afb8bb44b43a0e. 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/81828ded-0a8b-4c5c-8019-ff7d0404a98b.json and https://artists.proofprofile.net/proofs/artist/81828ded-0a8b-4c5c-8019-ff7d0404a98b.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 0x670a9e6971942b070829e791aca39b950cd425ba79942694443732a74f9078a5. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCABM1364751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6fdb4bcdbaf50b045e330eb31945e51433bfc05f0b21caa0d62f90abd8eb47. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:03:42Z), 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/TCABX1427989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9416d3ca55675cc0adc88b2b64b8c847c07163a1c91740fdeed97710667f58d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCADN1865998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807b5987bf22c84f1415efd743be09155a3d07a93db420442390c3ff57b95bd9. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZHN91977462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76985f4bf1cad57258b74d8cfa2fcddd417d620335a6c43f10fb821f662ae593. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZHN91977465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e64c1eb3753bf4835039b3b6a225dec23d0b412def43d559e23b29b3a688436. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:19:04Z), 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/QZHN91977467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1896a3d92e047299c8784101cd4472dd614147d19044ab89e947110342d231b3. 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/QZK6P2024985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3907f31bb7b33e6fd7e437441b4e9ebffb5dec5330fb29824d233c785a372b34. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA62271994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833ad0912d9590cf425bbb0682c319b628730278e65ebb6d76ae679391c6ede8. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/UKU932272793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f50fc0d9be86efce97dac0949bc7be4acfc6ef08db7ea44bbc9626749252da. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/UKR6V2340382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828f1dbec6a0888c92a26e8367a6176f2f4e064b9b35dd4f11f5f98d8d140799. 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/UKR6V2341638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd36b4acc358fe39281bd3e36713f675520c85daef54b669a7b9eb0f92c35b45. 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/UKR6V2342431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dcd0195d6fc28514abdc7a5e4270727d2a0f17355ca36cd3e194ece1d778e4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/UKR6V2342822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadf45db377cae7b2ada36e1d6ddbcf0bc6a726028229288c7dc53a30d22dbf0. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:43:02Z), 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/QZTBB2370029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755fe2bb2702cec3c5327f3a9ec654395452eb8458ae11a0708c9eb08042523a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFJ2335531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20d490912299a279e0f22ea7e5f3d49e32543a557c7326ac6e9540e97cfc220. 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/UKR6V2343479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6855e810e0dd083bb28367281f8830d1cae300e6d66151cf9f1e625b4101fa9. 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/UKR6V2440012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae20016b31680164d31a952643393a016a729508fc346a0ee175b3a75585e55. 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/QZNWU2415663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8310bf50c39223be0a8949a9725c474989e55a10d3598b5c0de2eb42229d7b39. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:38:56Z), 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/QZZ7K2455637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc163a360effa74b594d217894540fa692448fe00f49fcd7ade428741ac67bc5. 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/QZES92575514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60813451fb02deee168a814f45618a80db637122c8e3f2bdf19cbf1ed8c747ba. 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/QZES92575516.