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 0x0b6843c06410ca93154f3c04c2a7d89c95961bbc5fe7c9425932160c6fbc1594. 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/9c1787e4-4287-4d41-8db3-4b1962ae8b2c.json and https://artists.proofprofile.net/proofs/artist/9c1787e4-4287-4d41-8db3-4b1962ae8b2c.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 0x0a39b2fa1b9b82eddb7e30f80eca48a2a332c45bd632ef055954ffd256614192. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/INS189611494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd563d9958724c7be1c8c25096a8c5941feed563702df9ea122ac705d05492ab6. 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/INS189611496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3aff44258b15b382ee19535bd511f5cd68cd114837bde5dadb466845e2e79c9. 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/INS189524504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1092703ce2789b4cc3f4e9e1bc4607e7dac783359dd06d80895633faeae0aaa. 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/INS189524505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006733dad886f5984525f2f00fff9bb708889353c23e303cd1fb480efaecb256. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/INS189524506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1031d619ad8a111ae614d672e9c0b436dc5d1906d62d4db6bd599f4223c330d2. 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/INS189524509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c79b3206e9d5bcef6d10adcdd3f29a99db4eb412342d2eca994e4d36f9a526e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/INS189524511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9f51ecf067968078cc0afef27ddb4e77afbf1ca7211af8fb5e1aeb1829d504. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/INS189524512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2f50b9d8c0a47b2cebd32ec08beb623903a5d28578fc0a28ede9d58d922e85. 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/INS189690152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c37fb539d6c94ada82e6ce079f20831abdd165a637a72c363dfe0cf815f07f. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/INS189690153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98777b613e5e9f16a9e0294182f2b29f4532f268921fc14b99d55e2b2b0b2a65. 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/INS189690157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922669ec1df02dab6753ef1560c78bb987a9245249b18df7f9b8e6c751010f10. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/INS189690160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc527da55b7855ef969adb49ac24ef0da03cbc07f2f3f4ef89de735311e99855b. 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/GB6JE9803709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89e742786605e392eb9d9d2668247f0a3ec4018157673f7c98cc78a58b828a4. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/INS189812347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b592c0be7093113a5355935d38cb80edd304327a2c40064915f39f4baeaf1a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/INS189812348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444ac37bfa0cb8c35f8e5a00c56f2eb0d936de361987917b587846afe23c4d83. 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/INS189812355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58d4c4e949d1d51dc5cc1eb3c190fe6265bca19719470f6877467b43807b499. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/INA531400854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395f3906af17074c14cd3122879c365f741c12560a5208cee7b810c59278ff2c. 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/INA531400856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6d6335325f899f34b6aae3ac8781f922d2c34ea2b2df9f4ba899d31dde411d. 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/INA531400858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b7f46e10042e52e5f3b7eeb036800cfd0a0bb0394f5e05ce711f75f4a44525. 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/INA531400859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89c0842c90cd93c29efef1b23f2c6611065d0ce0776cc18c1e710872c91569f. 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/INA531400860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161641027bf2f48e438b75f90d58a1d3050973df77ae9849e1e36dc2317c3755. 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/INA531400861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c4abf082c7bf3ad8230b3dcffb130048c0f89f57e5a105120119bc9dc69680. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/INA531400863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19eead85a475d285b16f6ea23971974915cae59cc2b2306816f551a3e6f404f. 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/INA531400865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea94317ff63ae44ab4b41b775ad6eaa42dba8b559c401cbdfba018363a5cbdd1. 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/INS180600437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebe52dd39fc22e12cd8f84ee805a887d77f4925bd2e5eb40c8a3b1f4c76001d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/INS180600439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5281608099781a58e112bf717f041cefc3c424d3c6ed9374d7dc56329685942. 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/INS180600440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ddfcf14b939de3097080af1df396e4c55b4f06992f941e873d5dccc74a5098. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/INS180600441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dd491397cb540623f89b5a61361fbe477ea83a8c6211b7af4a1056be205125. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/INS180600444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf5013ce35758e9813f6b8605eb76feb779bb924bb4aa21a7031b99de639a1c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR10S1896448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ebe5b07ef3da2542050fed54afcd62537ff226294dc8a856743ad824e7b8f3. 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/INA331300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda12d81aa1d1f6aabce0fa039e76f8fd62f5f7117f0424cefeb31454fae11ae2. 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/INA331201011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9159e1ceb12e6a04092d650fb2ec2499c981b4f58b0fd301c28e0c3e45c8230c. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZK6M2412077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a85226bd46762c7a0a8ad747ac29ad5ac349fc508b3b712b7e05da282f7a660. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZRP52480074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9075c5fdcdb889950341ba886e09ac0264c2ae4b2415bea5a493de8f8bc9a9d7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/INE182570111.