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 0x0504892c3a1af822a75d51cfa6703b0f71e5626ef82a07ff72ee8aa6c834be6d. 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/f7673e9d-f3af-4d96-88f5-b0a195120ff2.json and https://artists.proofprofile.net/proofs/artist/f7673e9d-f3af-4d96-88f5-b0a195120ff2.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 0x723ba3d10e7b49e4fe15e4e2bbce7e64069a6b423202a98e9ffa598523638666. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/AR8L71301222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892f02953010f1de4838c637627b217782f967bccdeefae5c3a8ee84d9ed1293. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/AR8L71301227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9a219207dfffaf3882e580fd35204d72a57d05a2c56c5d4f9a45212d2299db. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/AR8L71301232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754704260b27094b9143a7aa371fb6f9a577d61ff1a4bc6da172c53c81a79483. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/AR8L71301233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e08690d8d24abf27cb2c32ce11e96e5b2327a11c11bef848c5aebc96bbca24c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/AR8L71401092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1f3b827cb2d99e5bafdaebb8c550b036f2fd28bc3bcdc8fd89bcfc86ccd83a. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/AR8L71401094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02334803f1406e0c727cbdb46d3c35537ac1f5b73270dfcaa1602149bf7faf93. 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/AR8L71401095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a23ab771e9c09bee94c4bfd4abe2006211b81c452c9a23e55c7f48595b9bb8f. 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/AR8L71401096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b552818e53545404f0cc54b47e7c5cbe7ff68c9a28f5b92d7eea0d0ac26ba1d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/AR8L71401104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f04a245acbd3e6d42b8261a02349b93284d0eca4284c0583ffd8ca3ebf5bbd5. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QM7281424217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba49d5eceb63f446f4855c91fdaa56329e0073dd92aa660712c292c9d2879b0c. 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/QM7281424219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6075d397809ec1b0a085c1a5c22eea33807a97c3cbd52aefa1efe80b13ceecd. 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/QM7281424221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44c0e532d3ca873e53a55aae8a8074aaa931d417c107f42cd697ed166927ad0. 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/QM7281424222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3ce45570b7ec23100d561eb34e5e1882a0484a45c009f9050d33b35cf95341. 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/QM7281424224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0278d7f3bff5edf06b5c45062c74751505b4f322e6db47184ff1c6d9574ff6d5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM7281424045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc52df444d02448f2a5fc32b67b5e274d31319cec18bd9bfadd785514349fe5. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QM7281424046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73784886b8df4bd5e259ddc9f16b97778e1e26957b5139c85f6d351ab874deb0. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QM7281424049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dec16a0946edda1c558abb512ebbc6df02fb4a2adc0757108d6a4949600d60. 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/QM7281424050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169845fd34a69cbc01c14792fe3819b872f83542f60e7103190453b7627d4e7c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QM7281424052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9f5bbcea116c30fa61b34b4430b78cbeb7f5a4b77400a9bcbdbc72c2cb9ef1. 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/QM7281424053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c15ec6925b5305dca51aa6d335d8ad899d2c8c5a392228cb3b9e3a69e4ecc30. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/QM7281423981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c06993186f97bacad1905176b841f24f1b8507e1408355a638acd8f0dd9dca. 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/QM7281423982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb00708936b89cfb7cebe72044b7b9625543678503f7db786b47981f7032f176. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QM7281423984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07daa7e687607177917fb532c443259b1054259dabf91dff80ffe0fdff5a9442. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QM7281423985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074a451309ff6b06b860f06ab0903db1074ff7c007ba961f93a693a9f166a3c3. 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/QM7281423989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705ea6712670cd5dc7fcb4a917e3fdf560547b3297037276df26acbcbc2712f8. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QM7281423990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d621482ff065bee9809560643fbbe5f1b764b7997bcc52df134097251b8d83e. 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/QM7281423991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90811a67866db58c0b9d67a02636a1c3cb7ffc1780a0b86d6e9f51702d3710f8. 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/QM7281423994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2411a2d3784ba4a62d70fb1191ddca98d806f09e29012561e60b5d4652148305. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ARGDD2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abf804d95aa3c1f55552a91e233d16b82eca8a6f7584397d2582c7c380a6c7e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ARGDD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7e07a196a4f936614906c142353deceb025e212695a96374ca2bbbd7b28e02. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/ARGDD2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2411a2d3784ba4a62d70fb1191ddca98d806f09e29012561e60b5d4652148305. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ARGDD2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfcea70877cd13d9a3403bbb94267e72353e6572052cbf03725760129294ebf. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/ARGDD2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba5e6c5b76b8da01f9a70a18a3fbd4fc311e475bb575471c99b2ac913bafad1. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/ARGDD2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d83cd7b3a73a7c097554d228d8bcee925e201e683b5b4095d2266853ef92961. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ARGDD2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f15ab0731803a08432d5d4f47e148350298548bba9f024359aa11dad3a4e63d. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/ARGDD2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029e661ce1eb60f76fc5e5d9af2d3ee9ed08a4f6e0bb5dbabc6c9787ce8cfbaa. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ARGDD2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9badfdc3874612dbd71337a7031e2ba4a6793e8b378be20866857fdd993d509f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ARHO82200027.