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 0x3201bebd68756b7166fa0e6654f41dbe423a7092c2acbd72b34ebbdfa8acc394. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cce5ad1-8dcf-418b-80eb-6d83556aa3b9.json and https://artists.proofprofile.net/proofs/artist/6cce5ad1-8dcf-418b-80eb-6d83556aa3b9.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 0x3b2f9b83f494227618c7b80e61f22606b200d49550b877a132fe042704b2e7ec. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TR0012200539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d00713666a695ea30a3aadd51b784ab74e43bd662edac9d0d37b0a629da7056. 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/QZMER2297165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9473887a9ae9fe1820c0ee69eac0888f6d3bfc1537bc316f512ff6a352c6cca. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZMER2297166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40b6293e0f36aa15af3c503d7b9234056f0cbf7f9a6bb54aee0cd78f0ba6435. 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/TR0012200313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b183948bb64a803bf76f82ab9db03879f21be39d5e865125466a4bdfac4d4ba. 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/TR0012200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df0c4f4a7ee4959e850eed1bea27cd3478cb9e63741b751f611dbc1b762cf3a. 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/TR0012100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d7c37f85145dd74a70f0883af9cbcd186959fd98a5a18d7e535b32ce7e452e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TR0012100587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f39f71a79b1de9c9c6c7e1ce91b6880e1f99e5246846286dcd7e3ae4590ec7. 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/TR0012100571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fb2ddd4edc8e14e72aa83bf3195cab0c38d4511094f626ae0dc93c60772851. 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/DGA062031699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42be471385655e995cfe1304b9f8e76e9f153d04a8a56282d1492d95c63e8af5. 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/FRS182040188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d352bc368926e33c3396804bcf5ed0d5d164a3ce906988b0f25f1edccab6458. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR10S2052049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7053d323de2e8feb704e1567e879036aaee5d29403f41eee127c67773a9f6d5. 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/QZES51929721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf405b736630a8a58c4c829c4e27b351254c2b1da36a0a5ecbf98791489c61a78. 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/QZES81800411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81301e84520478eb92b235e7dba321b649ca1a3c81a1ccb70393a188b110e00e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZES71816879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78cc15cafae58309923e6fa3aacaa6ea365936b4d7a5f364722d441cadb7014. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZES71816880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34a57beb89e051b8f22808cc98148d598d621fd330136432a1ecf7c2e87b6ec. 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/QZES71816882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5ee73f174801f826b9fa3185f5623af374d789a3d4100efab2d05c1a137fd8. 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/QZES71816883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3d7701be862522390bee368d6c0a6520c3337fa1b44b426f0f44441550ca1d. 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/QZES51889619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bddb049704268f146292f5c0b9eb84df425f0b423fc8be63c7a18945bc8671. 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/QZES61817812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bb787234c86b05c929a9e89e0ffe7da037daf9a8e5500798e97ed38531aeb7. 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/QZES51889617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4050fc8f786eca60aa152e4da19c5af222c3ab47347946c2af7eedf42984d27. 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/QZES51889618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302f3e0549eafd60508fd29e4429d01a697962cb93b27f250f6045ad0f371a38. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/RUA1H1757559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3d5662fab0209632d03f86bd502620cd78b59db7a862a59b5df7fc9f5fda95. 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/GBSMU2319922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe84e96b0fcba165f9c5b926a628ebdbf906fbbaffeccecefbbe812769a2e560. 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/TR0012000465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc920fd18d62a3e13bbb9fd823583bdca09bdccc91cca85404f7d355ae892e63. 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/TR0012000466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b4aab8a69999140746b0a7b29eda6fd685c1f9e2af7875795d04717e604eaa. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TR0012000467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda84c1d041b44ef9bd9a79e5f2297527f89c1c46c3d71ae3aa54bd028fd7c4b0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TR0012000468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7391a94132003762b320cbce6d18ce1fbef56e2734788bd6cc7e24e982e432. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TR0012000469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190f284c63887052598afeb2dd052a3a0dad226ec1ae234a9df99546b2e8eec0. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/TR0012000470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a75eccb7016c6b047da8719e04bec1940cfab59572b584f1133cffa1431cc67. 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/TR0012000471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049062836bf90b6efe523c528b27b8dfd7d302700855ab06a5439f4a95feac17. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TR0012000472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe963e42083e938355c545a181bc1a45d6d7ab2dc7e3721552d975ef9d84a512b. 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/TR0012000475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7868a6b8038e60a807854785fe0d0303bb16e49c1f2005d81f43bf4b0d0608f. 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/TR0012000476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9e68303306ce575ed297053aef3601172d9032711c1ff7880736cf094e17f9. 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/FRX762006309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea79212f6dbf8e42708d5246e296c33adf588f58ff798144291a7595e16d7304. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TRAHZ2100223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa23216a8034bdec62782dbced727e9b21d583bb0d5ad615a1863f961d04710. 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/TRAHZ2100180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665297b86b67746cebc34690a626ad76bad2c29bcad609eccdeb9c80b7e725f2. 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/TRAHZ2100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884cc5a3be71a2dabd1523372d8c656d2139fee8da6e1a2422f7eefff4de5641. 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/TRAHZ2000124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c71f306be6498b576f83b11de47ed4d4030c4c65bf3c3ad34b2f21e863c74b. 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/TRAHZ2100224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f75d7e0979aa0fafd49b2259bdede8f0f034994a395705eb05ccb8a148702c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TRAHZ2100165.