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 0x939dbd29a4d50dc201d1ffad67efd997214bba273feb2e0b8c5b58b4efb61463. 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/69d2b557-5b74-4955-bbfb-b98488557820.json and https://artists.proofprofile.net/proofs/artist/69d2b557-5b74-4955-bbfb-b98488557820.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 0xc7d9052feb643397700d1bed92da9634966802d90544c9fd3750947bf58443b4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6K2546303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6542e40452f4915f5138a3bbcc7f3ae26e7793d88b7def65b3909772f9ad3e61. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6K2546304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e1eee9374e9d10548fb0f6a9642d1fd2f42e6fa16856bf453dc3ed5595fa87. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6K2546305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fed7d515786112b9596736bb8167f636810660f197c83a08fa334ac137110c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6K2546306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd637cfd7d7e7ca136eaed32ff8a65849e39671a0142abc6e81f492a086abcc30. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6K2546307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dc5c1980214008a8b13b1534932386eddf6983d60c510c653cf2a0f0ba3982. 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/QZK6G2509939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2678a7cb708f77279e64511253af977612cfcd7ce235b19a74915ba36c99f8ef. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZK6G2509940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ae89293219b66281327b794f2d2323b666ad20645cc9071d58547df3f49c20. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6G2509942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481c48e21480de352ee6f6091fb7e24e0257e65c5f19c3b7545515f9a6e3efb7. 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/QZK6G2509943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7651df6472e864a715a0746ed1aa88b585ab805c9847c84e0411e59c9d899d3e. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZMEN2528893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795e3c129c4fabc20882d97dbc83e1e96aa6af898b8325a4f992c4637beb205d. 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/QZMEN2528894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a97027edd3329362b74e577047a9ecb662f2f33f7f06fed3a1219795b4a6bf. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZMEN2528895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb328108f1fee0486b0ea95d013b72c464f95c02ee304cacfa845863d74ddcd96. 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/QZTAW2546750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908bd69b0c092038e5e3e2c4b4443e49ad9ed67bcad84ef2cbcbd590a2b7a2c8. 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/QZTAW2546751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26c46babc176e7208904b90631bff3aaa58edbbf47e82e7d7f9b658665bafa8. 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/QZTAW2546752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba622deaefe260475e83ad94c95337315f0c61348533fefcca99eb573bfb6ea. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTAW2546753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e2ad338120f7daf572709ecd50028b60efb97f5bb02c3bb076eb953e407356. 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/QZTAW2546754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e54fd002ef0ab11bcaf4dcbb4e4ccea9426dcf1eeaedf74ec54cc772bc3da53. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTAW2546755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93fbfc39bf7798e7f239a6906cdd500aec43b3bd0a33e8f39ac682cf72ed104. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTAW2546756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195602470676d8d99aeb51baba856e7f2f53031edfbdbe4c480c8d5abd2b88d6. 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/QZTAW2546757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa818b4ce6e24ab4343ff5974a5c0e9e745a3ab3b27757db058c21143aefb971c. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTAW2546758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875a6b601509b358dc5e08cbb64ad01ad13f257391f98856157acbc746f750c9. 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/QZTAW2546760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004a32476e6dff862fce77d3533b04811cbc0c17f383b9ef446dd792b47322ce. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZTAW2546761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8321dfd22b18771b923a225337e6fe1a3704baec909da06b61e8ea9f416d5d. 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/QZTAW2546762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8769bab1b1e469dcc9a737f82c9716177109e34ce7a4c8dca6bb4a62b119425f. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTAW2546763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b4f2878e0a01248bcee735306d9dd1ad6ab9b1213cf8bf438f779c3468dc28. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZTAW2546764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf105b638f1f9c42b9b242114ebec7af8176c23dacf154d8ee3324ce9304d05. 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/QZTAW2546765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf8bc81d6bc56931053f4d9ed9f19f1d527f35ee7b0cc30921dcf0b35164847. 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/QZTAW2546766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb373e192fdcdad93e33c4bb8b19817b8d78d5b8e3a73f937d3e28affa52a1ea2. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFQ2555147.