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 0x7a4a0f01f95b4011836e104ab8fe86016bbdb0bd326fd657c97714b15515dd4c. 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/0553e8ce-5c1b-4275-b203-020357c99c51.json and https://artists.proofprofile.net/proofs/artist/0553e8ce-5c1b-4275-b203-020357c99c51.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 0x7bab64bdfe0cf38d4e5c373afe8f7c5c93d1ee464bb11d20f6c9fa1519926344. 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/BXIV82434768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95874e2b1cc6728fd7fcc349dc030ca51d6b1ac209ba9890498be67023c6ea4. 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/BC0YP2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cff6b1feed75832fad55316056b9193701b9fbf81d9f09b06e6ee0ef5ff169. 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/CAENV2431632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb70786de8359626c25e3c463899139526a7b51d79a5ebbafd2782ac2d99e1d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAENV2431633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6cf9523f1deb402e1e9e6fb2291040d89939d95291b6b6914acb31174da0b2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAENV2431634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03eb0a05b1cf2bcce5ae7d868f2cd38da457cba1b492f8ab51ce36c94dd81ad. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAENV2431635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe96272d3ad6fc53bb2a20e3ba318b71b91923fafa2c6204d6f66f6dfce6e4f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAENV2431636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9307b24d952af6352b3ae2dce63767ee6791afad5e4135f5034c9ba1fddda511. 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/CAENV2431637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6431fb71b477afe0598efea8e6779642005c55681fbfda55bf9bc098bd887cc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CBF8B2444251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee82685284aea23f6fa6b427e2a1be2016eae9b7ffb6c0791c59ae6b9ef831d3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CBF8B2444252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba130e931f8da3d4df1acfcebe52e102304468e6ff60183ee9990d049cd058af. 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/CBF8B2444254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fd7a81825962079d0b4a43d6d9465172285851db2c7319497dfe70167d0149. 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/CBF8B2444256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ba2bd082f5ffab570153535552627fe05d40d1c12873dc627d1a15e2a13a87. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CBF8B2444258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4520c60ae4f071a9724f310f7684393fc32a922c52df94da92dbb6b98ab93a. 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/CBF8B2444260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bae08e39328c85c1946198882a7dcbb6d00145ca4b3d3b462142ee8ff54e5c0. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/BKWRV2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4c80b20ebf25e99ded9f1870b29e1d97f88dad5a75d947a62593219e03b1f7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKWRV2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8f409045271023888acdb6bd4f084257d385c13faf1a2968b9c7c325c41c83. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKWRV2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa114f032d32529ab6854c046648e1b7ca31b59695ff3a20c7a9d31f2d451c849. 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/BKWRV2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477c760b52bf06b6ab7c48b95d257f27bd4cad2f583d5202b627102db30b8bb0. 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/BC8D72400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd2b773ace3073b57e02d3d01fb0d555ba1a3a6278de0bf9509f5e0ddc9a8d2. 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/BKON72400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0db4f3f368ae3ce5ebb2051af03d80b14661689c63f5894dc3b31de6f77d925. 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/BKON72400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70caeea0a289a75543dca1e09d4bd1dfb800a15cf5efcc7b4c6a57dee5aabb7a. 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/BK3DH2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bb3eb79d7c7b3bc786a899b046f10df2cf7b75e36656260c21b4d657df4e74. 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/BKON72400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12620b819ec80c7389970fdb2244ae0fa3423e68a0deda8b185e3ac0567a5d8. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BKON72400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae950881948689dd558db9a9a79c1eb72a2a46007eb1430ed33069b0406ff71. 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/BKON72400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4501b7f32bf603727411d0e793ed58c54ef7fd2373c547fbb912161178679d9d. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BKON72400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132490b9547c3af23cb0759f5094a5340cc13ec2ccb626af798a87d0444bc733. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BKON72400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb37a99af17dace915f756b76265a67ba825f4e6cc79f8e59063c9380f67e2e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BKON72400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec82df57057983ef0ed30646c260f05de0c558df1790a7ac7663f86a52bc62fa. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BKON72400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1745eedef662fcd9242fae6b25fa0e3fa58f06d5b28f24823e15d674ad5cca03. 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/BKON72400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa378aa9a334c9448eb4e92a382a63d7b897129b875c49b76f9ec00869d92d0f5. 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/BKON72400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5046177052f1a44abadbde912fd7f6e7e9505e0f3938b878e89a0f12e7d22f7. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/BKON72400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e46441ae23016bb4d578c7148f7bd4aa9941dedae604ea308936526ffd14f6. 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/BKON72400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785815f8e73ca8e754c03db8483dda1b5ec91c33db7e64586a2864b4203b8061. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BKXSL2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b9cc41812b4a4d4ba0426ca8a05f5c9aeca2d8c3c3572f9e956cc102d38a29. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BXIV82427672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9267e87616a83e5afb0ee465dc482f26465ffb0cd749ff70c10788d366d2a2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZGLS2513067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d2b4a3f09455634829d916aed845f48fe8a65f48731312570dbd95712f6c0e. 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/QZGLS2513063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b344f063f2dffdfa7b931bc9d35551059d035e48febaa13913f855defc3ce9b. 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/QZGLS2513064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1fc22697525c52b372cc0a548c657662c1a218883a8aab870496f1800d3a4f. 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/QZGLS2513065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fd1834396840b49ebe7d64ae2c27db846550db137f3f3887e93340905f16ac. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZGLS2513066.