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 0x7e07693c71307253981ad745db830d85fb3b193f22f17cd566cdb2d5f0d6698d. 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/1a3722fd-8625-483b-8a7c-98a316b51acb.json and https://artists.proofprofile.net/proofs/artist/1a3722fd-8625-483b-8a7c-98a316b51acb.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 0x3a7ed049467022921bed6195b2df83a8aa457fb3e4bfb1eb91b6dc2a4c23ee96. 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/QZHNB2278410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e08af76564aebed000f5981973275fa39952b536cb4060a307dfd9654f29742. 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/QZHNB2278462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdea5a37f289bf883d851bd6159c73f38544733e48497e09e07b37e04736291. 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/QZHNB2278468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b31fa5e6a92200653ceabd182cff54eb7c3b2ec35a791144e788b045f79e7f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:21:14Z), 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/QZHNB2278466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd0d5b147b3732c8e1b6b798fa57425644cdad63dd71e8271267d4ea3330089. 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/QZHNB2217178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d0a62c8a28771c686ba937fb97c5263cec88cee6ff845b9898b891e906ebe6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHNB2217180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2e9f6b1a475004524a4bc4a37a179b499a68f9ed996a15ff14f8de3e4e4033. 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/QZHNB2218162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b5532b7296aa595fe52cc25e96bd0818ee505504feb9d53a5a8177404e4460. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHNB2218155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161458fddb64720f459c4b8f239b8951180a3f2d7e9dfb2be58d440e11886ea1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMEM2379933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ab482095f89b85ea74b29cb0237f8b7f5cf6ed0bec7dd3eacd9f3ed6910da. 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/QZMEQ2323520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6bd1063ff602ebac13db42be2d10410c9772204cbc8c8c0c68ab1da897ed1a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USLZJ2409802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd03be380e013826b306a2324f4c9a31a199132899b003523a2b071eec00828a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:09:05Z), 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/USLZJ2409912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee31ce873878c520f4b327e6b0b49fd3e8025f7d3cff153719f2b63816de120. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/NLRD52401053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e108c40ee93a29ed30637681892a0527b5f5e92468f25aeb6408d61b0c7034d. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/USLZJ2417249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a2e9d022ea377a9add645e6f711941ab1bdb4bebd7f89b3738cf57f06b9a39. 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/NLRD52401436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8109b2549068f3a779c10762020fba61c1295f409659f9b80e85a36101b1fe7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:05Z), 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/NLRD52414771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf338923d9b0a57ec75e715d801b72ccced4b55e9ad8b6c3ade7dc83271e828ce. 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/NLRD52414776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc027df9ab0d4ebc3a593587543e9bb5b7fc4f6b8a4e59f379d3d16ed5c0aa395. 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/NLRD52414779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06b3be87e5f8523346be1938e735444e0de24be1f2cea372090a04a2c7271e9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLRD52414780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a7e2b8eace6aa2f7801e32a08c29acaf5dd9438f2f69e3fb66435c2548b225. 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/NL3M12412607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9786fe44e81fe75fa2a29d1c04e0ae39f8b82f09b8fed35f951a9e8584ff8444. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NL3M12412610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf3c9d18f14c97cc398899b383a388363c8d76eaf5a08da3987e610d838ec31. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NL3M12412611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9640cbc253c7d8e0b56e40ddb7caf9b17aff76b6654e767740d95906502d27. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLRD52500396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6154ae00d4f96ba87ee122fc8aaeb573245f2f7c9f35c129ea83a34c1fbb43e. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:41:25Z), 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/NL3M12412724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24128f370d5db31261e2c632783230cb0a1651e1b28f553e5a9d92cbf287f83a. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/NL3M12412725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40ebfe255fa21c5d17816b3427e9fb6fd66d8112d5b51aea4f00f68541401ed. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NL3M12412726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad602c2a90121423c5bc78a72585ecb6cb71e71939dc30614587b3e48b5560d. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:52:51Z), 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/NL3M12412773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c75e0ac614f82a342b465144a62826b652d265637bb684120f43e6d503a265. 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/NL3M12412775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554ee1a7f0592fac5cefe9c403dcaab3c2b5f54974f3338b0ad0311a30748c0a. 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/NL3M12412776.