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 0x647c67b4d5979534ac4b92edab85212b11262e91905f2eba41eb07a4cf6e5a6a. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f8bbf84-0ead-4861-884d-05585980ff0e.json and https://artists.proofprofile.net/proofs/artist/5f8bbf84-0ead-4861-884d-05585980ff0e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x8ea795396a1462e88e53a7584eea15abda3bc0da8a70447000988cef5a3476ff. 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/USHTA2300668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea8a6de61e4b186be3b2c64c5922c8fad18433e35e2fb518f91107ead319448. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USHTA2300669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86298f76085b3addfdf2976269d054f5470da84d7fec8aabf6e97aa12ce71fb9. 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/USHTA2300670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931b550cd3856b9652db4353622910b160bdbb332d283c6288e6c9f8e1789b7e. 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/USHTA2300671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d28acc76bb79e7c05a0e1c034aecf6bd161a6c721189e82f77fa2992bfb5fe. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USHTA2300672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f783f4046389d745885d003b44952fa611339073ca2e0e05cde72afccfce8c. 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/USHTA2300673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa500c5bf118bc8b94da51f47d9e9717db5830b944c9e9ae3e6a2eb8e9ba096ce. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USHTA2300674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dba203d2d480706a83a8518058a558c68d29c72684618c19cfafa54541cef1. 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/USHTA2300675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf23505b2e3527c756875b2f0911e489650b9dca9667daac2d891bf4f9d620ff. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHTA2300676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919371422cc46ad0897ebcf8cda6bbfcae685eb4be6f4206c5f93add21ba2787. 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/USHTA2300677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47f3a811228892689c96cdb5d8e56f18f938037a27a2cbb4fcc33a0af4c0a38. 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/USHTA2300678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06a9e4ce8db957b1f0bf7721f60f52650d0e4829c81cf307259be94b5ed98ae. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USHTA2300679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345a6006c401ec12a083836cd84a10014c1de4ca1ce3d8062fd8449a15e82d2d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USHTA2300680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb22248ec40365bcb808b29b1ead5b6105d4af7ce1e852a5119938c397dc2483. 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/USHTA2300681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f42d5c1cb3f0803c1d249c13cef042fdc3c103da7b321e8387256ff9ff58fea. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHTA2300682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee8616f4e74487bf6afe0b4fa63bd1783c2c5a278479b82f8db9ec4d61fd6d7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHTA2300683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc812bbb47419a9bc92ea530ee36c4825dc1220844bf50e039c739f71ce46f2b5. 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/USHTA2300684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753df08a05851fd5125b39dc61fb233df25824f5d36be91ca3a7a718689334c4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHTA2300685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d60c94527e3eb0b9fdfd14a05ac75aef43cd9e2c2603f00ef6abab4104ddcf2. 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/USHTA2300686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4958c4a787dad20155d1b66a6d0586d468925fd2a4ce61015b8bf0e2d4dbaaa9. 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/USHTA2300687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbf75b0679fcdd73b4477bdc8a307e3e1448a35561594e97d3a62cb50795c13. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USHTA2300688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c10d1661ab7d7ef47e5d0d62f6cff1575bb92a0966cc6e9a1272a0135fcdafe. 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/QZHN92099334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d63dfa8e5d3be4059b6ef35795f5a39f7ee2b44e05a3d3032876306e1dc4a62. 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/QZTB82449572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4265759380f9374f30a1566c826a636e2b117e4e574a1a7641156a158b6153. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTB82449560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f41b0d7b15c95c0e94b7ff7c0869bf1420f37bcb35363bfd08008fd4f900b9. 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/QZTB82448009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cc0f7f7fae29f5dc8be02816cc36d26aa1e2e1eebce84de99028c54331a605. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZTB52467916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa500c5bf118bc8b94da51f47d9e9717db5830b944c9e9ae3e6a2eb8e9ba096ce. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USHTA2300674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dcae5d06ba7be4677d14dc0532dc472ccebe7b376a512a95e00c98a4b453fc. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZHN71947887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380099e9fa80ad92bd64d288b89c792f29cb0470a3a49f01df4de70e0e495d75. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZDA71999021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc298fd2f9fb7d3da569b543afef4d5456ab4d3b982f68f808e97b05b5fe5c7f6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHTA2100592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a4f850cc098aa428e17d2177f37e7fac029d432d51ea0d5913574d5dd783d4. 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/USHTA2100597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf923e4138bf255e697e6c0023c8b5ffe00f02b3677a194a4388db072c0d625d1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USHTA2100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd862a00e26391ab953bef702466eb56f323de902025a8661e21b50bdebea75b6. 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/USHTA2100619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20f824ac5dbb42d7791df574cfc7981863b8201dbdf48c6e9e719df7add3e3d. 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/QZTB82311478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2ddc9eccf19859fa1f6e4d59dac90f3718a212ac8e1d4b8910d833a330cb2f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZTB82311481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xface3569c2ece24c27ba1c415fc2ea654641485d2428034d29a8b06a903e112a. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZTB82311482.