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 0xeb1ec870ad815c07d786aaa9475de4eae53a38b477559397261768044cf30004. 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/61dcca67-d42a-4ff4-bae0-a6d7ca8064cb.json and https://artists.proofprofile.net/proofs/artist/61dcca67-d42a-4ff4-bae0-a6d7ca8064cb.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 0x39468171996a85459b53d1e2d33a83e34cd333ad066d126a9e99a428c8e7638e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFMF2388011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3601e15a88451a0bbfd923512962221808423861083bd151317d441f35393a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2407090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4d00e7e5d72a7dac10e7bc22f05d399b0b7cbf4c602305fa2592ca93928a5e. 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/QZHN72461234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437afd76cb833407f2c2a3ec6c6cb0cb4dd4433f5c483bd2b9736a50a94f82bc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZGC2406712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10645f318ea21259391639c0447a7f5d5a384d0331068147192b4eee022008e. 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/UKZGC2406492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0785fc36b98bfb866d8c4835981896d8377229a629bf0012982ea9ce245fc3bd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKZGC2405558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ce0ea3700dbefa5dc92ae22f1ca813b1d22d4f8137504ed7ee32bf0ef113d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6MZ2428047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9623a7c28decce400ca8e4b55d258e2515caf3017bc15072cb23dd9f38d89acb. 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/QM6MZ2428048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573dce35aeb6e81cf6fda8d2da0949212cbd33e7fdf5be90b99111f124163f0c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM6MZ2428049.
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 0xd9c1ae2cdf74ca70071f597da708b7c5bf64dd09f987946a7ce148ef72c3ac39. 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/QM6MZ2428011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6721575d64d7c36aec5387b7468eb7ce4a4c8b68bb8c88a8b79ad76fcef4595d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6MZ2428012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c56cc93f36ff336bda5df9363cbb117e02e3697466206dc76fa7c0060a2b013. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM6MZ2428013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5656c0402e03d3e84ff14e321b8287fa579024f39fb05f9a43e9d28c63ce046e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2401571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb7f273cacf0f5c7e88a3505c4cd26dfbcca37063a2f7c409c281ace1337c79. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZGC2401630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e668db33ad173ec1955f5df758897eb8bcc16dd9e2d02edaeaff4fbd2952c1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UKZGC2401376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3749f4694641e434f5c7d7cf0ccc18cf7f7009b8a4d6f91bff8287542082a2ae. 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/UKZGC2401225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8790e41cbea38552b3fc4a98acc0baa28dee2b1096a599e593ba2476bd477c2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2309306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f555a5e4ec94b80111b966b5a4842ab4f500a539acec0d617fa542a95721ac. 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/CA5KR2394984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1af7db4d0299b6eefcc367c5125e99ab1f050f318d4a79fb5276384018d4100. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2394986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda398342944b44acab80fd5ee86e0162d11ac528fd42e83b6f7e7a5cc52880d5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CA5KR2394985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db96e26d87f96a9e19dcfbad02cce8576f05ad0ca29077d56af4d4a056ab6cd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA72384883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34415021f3e023508d9f42b0b0f58163a0c27a33f2bcb0517408a737f5e20237. 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/UKZGC2305562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a147c37f7496df3af58b465dd2a8621bf37f04ce174c58614cb330cff437a89. 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/UKZGC2305325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761e93c88d826e8d81099e49fb75d06994aa357e8cac5ae52a32d23d35283548. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKZGC2304120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1035963f68924070bf4c6106036041eab5f26083ea6689cce75517bc4ec0b18b. 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/UKZGC2304040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd24c189240527abd16f2761c8548b6b4979e2bc9feac3baf2462434c05357f9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6N2335982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21382277291ee2091035fa5d858804eceb02d60cbb1b5a1c4d2c7c8bacd84c59. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TX2368613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7143d67bc357e3687636be38ef734b756d6394b828d4855a82ab7c5003fa25f9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TX2307406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842f04da637445c2c890b8124f74dbe66221fcc0fe308f1518c594db4bf44fe5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TX2307404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966a7343c54322f84c07d55f5b32df87046b2b211a5ef43fd593a8c44221bd33. 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/NLZ542300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fddf6ec652376bc68298e1208fe905198263e6709cf3a7540a4b4ffd2359e2. 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/QZDA82399364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadf3073bc081b555b82675e97089c0d4179fdedd9c5804f5ce7c8d7f3d9972d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAW2273872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f15b14cad419019fe9162d89bfb7ec32a472ece62a2c159ccb9975bce1b611. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWW2248188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a793af372630e8bf33c74d604d5b5e4d0e52c8a6871d66d7b0bddd51eeef0a. 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/QZNWW2222476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac4aa75af03179fa408d31f9f6e8bec2573e79cc7008d12747df711d78d84fd. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZK6J2258189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fdaeea50a88dab8f6497baa4eb0b5d6776bea01e123db1d13f4b07baab056e. 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/QZNWR2252136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f73bfb99b25d492c94bf77e6ae42cb1bfcdec36eb99da3a88c1a48291d3672c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEM2214275.