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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb478b3f4bac3bc0cc0c02b8f716b4f46221e60961aa27e3bc7c7a44e9061db. 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/6640812f-b0d9-4db4-bbee-b147e91932cc.json and https://artists.proofprofile.net/proofs/artist/6640812f-b0d9-4db4-bbee-b147e91932cc.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc893ebfe735525a6981ce7fe0e2c2843e1abf6f73d8bc8b0af5b46d44811fda7. 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/QMFME2080563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f28af22f5cd2ec62d6bcb511985237dc3f62250e42e089f15bbd1b85f76bfc4. 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/QMFME2080565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b8b92a7e00895b7253c2f3d2266c275299611db1a1129f6b6cda766451429a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QMFME2080574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5324cd94f053e452148234e6e00fc814bd4d1ef855e769c814f420ebdb6532. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QM4TW2155664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a53f5d6a80b8fc95b734de154e8cc21d206cb55df6e0e8e51355cb765f6d9de. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM4TX2100681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeade6b862fbe1739902b200f671adcd750bacf2e1cbf38d37caeb4a8cc16be3. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/UAKK12100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9953f73b602367d92a2141d745e8bd91d20d3c06e9ea422af6d9e724a1b1cf27. 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/QMFME2189729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40837c82f124045c403a2ef7f77339fa399bd5cd2d912a7193ceabe720f4d202. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QMFME2190368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c15f6893a588826e9256d8fce76e1ec00c7161b2b49e75ab739fc5e3687a97. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM4TX2206691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6990b67f51c4214ad5219acd1f7bb838ca0a1c348930333573fe3cd932b4668. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QM4TX2285447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7d2ae1bc53c51716246c0ad8f17550d87dba29947cfe2293e7ef40d929c280. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6MZ2275963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a05fae236f084bd4099518e66088d1dd95f6de6645540a943760df51cf1020f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM6N22264918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55d23971c2f56a167e73cf1b07a00069ed8738e35028fad3eaf895589752744. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QM6N22264919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2beb294a1572e81842f2f4c566f06f24ee486ac25701802c8597550c60ca7292. 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/QM6N22264920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148816247c7b01aed7291fc3e09722c369f9b2e06d14b4189a4314296d7f1b7b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6P42224499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6c0f6c446869bfb3239db1c12fd92b22d5ee2f5179206555860015e06b080f. 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/QM4TX2396307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97edb10e054c4485d258dc8b48970808c1aea8190c6248496c58ae34bb74c73. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QM4TX2396310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea4834f0681318089920394263317ca636933f26695d259033fb03dbcd7fdb1. 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/QM4TX2396314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaef5c02df4e412df67308c09ea7390ddf852152ff0ff26443de01faa76dad64. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM4TX2396315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f438fd0358e251197e98a5daa2fc72f04c82082f4dca103df3c9447c9068e86. 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/QMFMF2316593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39e26b8583168a4da2f243b7a75c5f07f285a1f815aa8794d5dac297845787e. 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/QMFMF2316587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa116033708edda64de3b2e6ac4a29e5a3c5da87f5077b355f74a308f8a2f260f. 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/QMFMF2316594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c5f0686c786cd9a8de82a95ac1bd0ea87978b564013888160ea71bebe008f5. 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/QMFMF2316595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bdd860cbfac4d96e24df6e4b1adcefab93dd034878fa042082e1fb8f3da20e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QMFMF2316596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a913cb6ef7e01b0848143b5149f0208845a771fc12bf43aefb0f6911466978. 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/QM4TW2420402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c9f32a50589cb8e6c2a1b153fff4e9b61a08a8432fa53b55f0a181070f2b93. 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/QM4TW2420404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abadb1aa098b56953b7fa18289070ba560ddf0516768a6777273dc991787f2f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QM4TW2420405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c787daf2f3005203a66a2f2e68428c0b17efe1a6ee7d1fe8c8ece482410e160. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QM4TW2420407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5560cc607dafeab1ccac8633258064fe1c3f30a0fad8aeeb3b64f12f57706440. 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/QMBZ92446422.