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 0x6dd6fb60810e315c47f14150cc6424e40806e13bf2ca78b7ffea87dc0d2eef18. 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/37713dd5-e1c5-4b12-ac15-61a5f97d9b2f.json and https://artists.proofprofile.net/proofs/artist/37713dd5-e1c5-4b12-ac15-61a5f97d9b2f.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 0x9beddbb1c2adeee4ba6e09ebe33ed004b93878e1f7410be8aa4e17bcabbe5a30. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM6P41982357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e3187e3a862ee47dc2cfe39dea4cd3c1a3bb6d4df67f3d79433442fe51cff2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US25X1089002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01765e6d3646e02840723f6157a87c997f6ecb4bcf81a86f2598c24d37d060f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US25X1089003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5745c743394b5ba9adba88be1c20ce91ca88f48728882463c9cfd079cefcf43e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US25X1089006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7595cc628dcf67be7ee7b809c2b381f04075500759074f29a605519b8b059429. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US25X1089007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6bfd99a742681a2b809ec3b795004693738f10511aa1fb6aee41f2a2020b39. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM6P41982552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf453a2da626d8a2b600fe942945cb16078f2d6ffddcfc2ee4190f154b67fbc4c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QM6P41982555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7fa6e4923278a16c98ca5dfc00ab4037771b9cb2bd179157672c258de7103a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM6P41982559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece17667896712dbf2962fad6c334cf81fd4ce4c23361def65a81b100f2f55f6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM6P41982406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3312864820d78a89b8f7f4baf7cbfda6520eee2c0a5c27a10c34c7d24c8cccbd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM6P41982407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a8aa94b006533080acf195e1efeb7f1e59912645bbc4d2b3e91fe54b5c0156. 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/QM6P41982408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152b4dd6e86971827d1e10ba6858cb2c1aa08011b7b713d1a738d2116db8efc0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6P41982409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe211459079845fa043f30d7efa1f2288dcf46c327654f9cd53d30590128b1266. 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/QM6P41982410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268a54a6a11a9e0f807293fc74bcf6274111cee63b29ba1f7f896c352bfcc436. 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/QM6P41982411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721bcbf79b6e719c913b17ee762569384a38d415c8aae672dc235e960fe92f84. 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/QM6P41982412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe204ee758ba9214cfb4d748864eda9a7ea3f71eb3acc75cb1a14dec810b29676. 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/QM6P41982413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8487e3e5ed9c9b3061e0e3feffbcbbb98e2a49ea2c9bcb1f2f0090560173adc2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6P41982414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c6e16fdae8cd8197887cc570b6367a0a948b701f9806e5db8e48e0ee044a86. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QM6P41982415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80726ce3fd5a5a5b3f2d114607f8356bc6231e10d8f29a42fcdc223492607825. 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/QM6P41982416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb98d4ea88110c24d785ca3764b20bfb587495b8b63fa8b4fed095b340291806. 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/QM6P41982418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a9770b2fb58e822c72fc6f422142f0c6173d74a2a197122ad2c51ae2f68995. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM6P41982420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ad66b7ff57afe9dee5eff13fd490f7e4c8067d1b74bb9cd6da87cd4d6a2f4a. 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/QM6P41982421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd588fbdfdac10e3db7ea48e43b447b2fed9373979e09f1ea51c7aae80d19e402. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TX1953451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440846f05de4923d83ee80280a0e34066f8d3a5eb24f39e808672ccb2ca6e34f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM4TX1953452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5682cf62241a31116c7f263cb598cdc29419ad1ae9fee8bf95fbc513f9d5ce. 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/QM6P41982569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ff0312ef74081792e252c25f7de20679cb56500f784a79048ce00ca2f1e777. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6P41982571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970d802aa9d7bc06c62e26d5ec84a55a9e22a2d6452a87537c3e43c7f37f4e6f. 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/QM6P41982572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdeee73d9fef65d06e912288fdc104525708a7ba72823b6b7f3511c6c4648a7. 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/QM6P41982573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db0349443c777bf5ada57abeca56d9ff699d644d6f955f7a9177ee746d43a1f. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QM6P41982575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375ccf7df52c8d83d05f97fece09b085f1937f1287cc5c7ab8deb3af47199489. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QM4TX2212144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09729ee4802e864c36797770c075feddfd407e06096c5f047ae7cde23712ad14. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM4TX2212145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3154fd806a278ea7ddfb3deb67f34c8001e6e856e35c568b1e77e8db4f97f0. 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/NLCK41043541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c461c3b875db94907c76d569b5397ae00df3fa73449e3a9bb1f861ca7237204. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QM4TW2301404.