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 0xd989ae062de563a82cd44f58b3bfde685add25c6a2d4364c283d32843f30645b. 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/41b4d661-89f5-40eb-a825-92cf7720a373.json and https://artists.proofprofile.net/proofs/artist/41b4d661-89f5-40eb-a825-92cf7720a373.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 0xb6e2aef9623e639f6c4bdfac320a505b2c666bb51800309cde338cdbfa4ae217. 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/GB2LD2410182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c9e2088d026a0a29972574d7911aff3bf0a68e6b594ddb8240ec98702e3d92. 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/GB2LD2410183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4aec9d2d6603a62a4397f75d0558d717ceb09b52238bd5ca3364cbd4cfae63d. 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/GB2LD2410184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb98237d31bb4aae3c82d2ca0a1ec6a4e4b3aab4be9728bfad16bcde3b0af3a. 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/QZN882417124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262f8534ea886de2a4a22ae944464bc4f0d2f119460cc12520e54d4c462e11b0. 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/AUBEC2563806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a87f6ec5d34d4435b2376e871fc5ccfb31b1293eed24602d426a41366e0801. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/AUBEC2563807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb6702458d903dc3d02934b2977951a8468d57cdbbccec5128168e6ea280783. 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/TCAFX2124018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954e3a9a561f8aed525b15c7a76f3f9c982f8470dc7250b212d0f4ca49d879ed. 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/AUBEC2487624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49f93f97c0ec27b805292937cd2cb1fa4059953c3a51bd31baccc2a5132fb68. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DGA0P2304336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439453e0e7ce53508f1f64815b163e51788928b90d567ee1f45bc191eb30a4b1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/AUBEC2483528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53af1815bedd09f98add297510050474abd0d351c67fe18615195b7392b04c90. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUBEC2339624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bf944bfb39935bf8d52eee0c588d45d39f2614401cece2ea7d93d076f66de1. 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/AUBEC2452036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c88a4934239f438ecb07fffbc6ca97c32d00b105604632deb5c190037aed4. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/AUBEC2350676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956bc168d23d0adac3a6cf2d69c57a898544b760221c329933fb134897c4dbff. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAGS2227432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41d2531c5ff612bc38e30852269b206334cbc673147b4d490dc23d644a3d298. 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/TCAFY2192327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f42ed361cd6df3ea43c3e47bb2338128ff0d0a6e1ae4a68883caaa0e42483f. 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/AUBEC2314549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4400758dabbefaa79d063574529f98c0b3c7af1616f45b79dabf8bd3196f5d23. 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/TCAGA2222184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866ae9e0bfb8a2063426adf3136f8596a34720c76fbe5b18676be152eea75efc. 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/TCAGA2275649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655b4458bd12033b5c76382e34ac6b1518e1b9f316bbb8bf855dbc618a4283b3. 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/GB8KE2417270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafb23f0a7b4b507c8215f76f7b731b29b8e39072a2acfad844534f60e2545dd. 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/GB8KE2417271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a47cb190ea2905b1cf72a96803b1e53cd587a8952dc4fbc0f5345c527dbe7e0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB8KE2417272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c46962718e9d2756e56f10b30c6060932841cfd795928f28f29691326b34af8. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GB8KE2417273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e6cdaa477543505bb2a66e710831200b46d49481e2b3edd769b476f78a730e. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GB8KE2417274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24025c6342a30a41e604be580ab4055c388f2d659586f75d71f85cedb61298b3. 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/GB8KE2417260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9931dc2636379a035a43a84b534736a6757273b820dcf43a878ebb00aeda76e8. 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/GB8KE2417261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fc1eff798d4f0dda87491c7e72c3e12a8ee8838e75bc6085ce8d68a3308ed1. 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/GB8KE2417262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15191a7afd26a85c2931c966be6b914b8993726f5959d8ed6e5640541c0a210. 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/GB8KE2417263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f07a8cc70dba96acae5e1c54c98f0eef7d90b401a95d44b589f7c1a2970fab0. 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/GB8KE2417264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8c4cb3455200e3cb53295c076095800ee9db4d01171e6b2542fa2ff8083340. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GB8KE2417265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277b394de0055868296f0fe620ceef0a0b4d32d296a571d4241213be7eb7d113. 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/GB8KE2417266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b01a8e227d3e18bb1adad9b33910b8e8a0acab2d56538c6a15cd69767602b8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GB8KE2417268.