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 0x76e8cd77f46dc32481c0575d54cecc79becbfba2d84cb2161a50e6c001bf0717. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2722154-a6d2-46ef-9855-360218684f34.json and https://artists.proofprofile.net/proofs/artist/e2722154-a6d2-46ef-9855-360218684f34.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 0x386d17bc739f98895c0866ffcba5a261220c29669f8b8029ec5191d3b69c05b0. 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/QZTBD2534958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed2f61ac488d9a2c14c9af8786113d000fee07d5378a2404c21358402e349d3. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:05:11Z), 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/QZTBD2537521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2969b3ed701a8ea61b7414f5d6e40be504d488bd6ff1b3d05b1d6f4263dfee13. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFS2547416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdadf096c2d2574a8178afb70b046235c4077835e88509d05ced7998d46d803. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:29:21Z), 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/QZWFV2512014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3517d900a9582758454f2b4fc0a2263a79585d15fae7452ceffe4f6dc2fe67c6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:15:57Z), 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/QZPLS2150115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71ca490f8e6911604608676ded3114fb4aebb9ceaec0ace1c2fd1da942031bc. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTB62298482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8013aa8634c9c20d9962950c65c147597dcfdc544e0b3037dd3221ba10953af3. 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/QZFZ62436145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8013aa8634c9c20d9962950c65c147597dcfdc544e0b3037dd3221ba10953af3. 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/QZFZ62436145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db24ac2edebe32a3933a2508632f95e5d7a067548781b00e2f572d07e519cf6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3EZ2402311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45af53cc6612a18eb0e10ed8241f67fc3496f9614aa5101c9ec62aa5f05e74b3. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZMEN2543945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bfc9e68d2dedabb660f9a53ae293141c870b7d87547ca3b3e02a241cf424f5. 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/QZHN32252946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bfc9e68d2dedabb660f9a53ae293141c870b7d87547ca3b3e02a241cf424f5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN32252946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dee2cc1015c9d69787f2828ea2f0234e7f6dc8b828cb4214e6da77d2d6e0bf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA62511904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ced4251e4871adb1e0754a408f6624e5760cb03e788503bf787a945f0e7452. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZTB22554134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e714926811073a8fd33e9396cb53a8893284e5be5246615041b98eeef6ba71. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT3EZ2433952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e714926811073a8fd33e9396cb53a8893284e5be5246615041b98eeef6ba71. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:46:22Z), 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/QT3EZ2433952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca5daf139a39060fa982f0e5d7f2e61565c2c677c5d93d0c1316b5ade351561. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZFZ32315600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ae99a31088f8341e77fdfe67fe50ea21d6e2db934a6d0c058f1c611e04bc77. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:47:38Z), 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/QZFZ72339310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af8bc273fbb136f927d401a252f8f2134338c7b43cfbf2d2f7b60b7713a9edd. 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/QZTAS2314772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f07901e4ac7b3932dad91217cac33a34e78e180bc7f940211a4b6e941aee15. 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/QZWFE2368470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a760dbd770181cfc862dab6c90589b9936f34b150babcf94f8440f6c32d1b49. 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/QZK6L2475861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466fee5a04c1bbff9e9ec06889c88cdc662cf7aded01a5b1ca773ab3b268186d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6N2528158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30613be62cb66e1c727e2985e521a87163fa7c33d6c6d490c7b5dc5a5f498377. 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/QZHN92520662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c291d3a31c4db9ed9cb50d0a379776093f17d0202f537147561893de6f62dfc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZHN52457057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45af53cc6612a18eb0e10ed8241f67fc3496f9614aa5101c9ec62aa5f05e74b3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:20:34Z), 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/QZMEN2543945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ba6151f997d497030bea1196f34ab75a6119cb2ab6e17b512b0c145ac2516. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWFQ2471850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22d2e84258364ba9f928153c69b640fc8ac80ba96a674c98ba6bc5a3de7b8a4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7M2500004.