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 0x8d758d99449a7aa07073e37d94865c0174cc1c294acea5241c24c1340846c4bd. 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/60e5b78d-4207-45f9-89a8-68ab253b80fc.json and https://artists.proofprofile.net/proofs/artist/60e5b78d-4207-45f9-89a8-68ab253b80fc.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 0x0977292483cf49c4201b13de1ff06704dc96b993146b8695636ebf96caf8e7b6. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/USWEX2000181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb97e29818c66e884fdc5792a5287d58d7fcf9f320861928043965baf3a271f0. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USWEX2000184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92c34dd6ebb995cc81a899faaf27278bb851adbfcb46a9fd35b394b7e4ac3cd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USWEX2000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc601fac4bbf7efa13af509038886b9997ef48d6bd0b96f3f3c5f693c18ab9e3a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USWEX2000186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecf478045a89925e4f86489748241795e0859a255e0aedbaee400295147a4ce. 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/USWEX2000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ce3dcc70159aeaffb8ee17a9d78c71168af83e8ab6225b69a3da88dc018a55. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USWEX2000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9add9a106b90668b4401dba922a3c5646092a727f02d8721ac43207c0e5fafb0. 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/USWEX2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64e99199b72c34376e0a075053a9bc3896f51e73a9573b8c09f317dcc85f977. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USWEX2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc0eddcbce88a0157f24a6487766b536b7d91829e3a641c71443dce0a945d3b. 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/USWEX2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0b9b8074039d2bcd1cbb880ff602b7ea658d61a4df0caa96b3d8dd8b2a60d8. 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/USWEX2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051c06c9e0e08fbd036aeafeee883540cef616d437fe085fdf2f72da6a9c8f85. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USWEX2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf668e1c8d856f2ff97b75c2d5fe52e55127d3057b194143190173581d949079. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USWEX2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fb385768712d9ea64c2f5f3f3056d9a568b350fdba791705fc28fe9043a305. 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/USWEX2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba6ece3bba6bb004c4ad801c3bcf0136cf9d2fbcc14a64285764a69c618d79d. 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/US8JA1878006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2a9ebf1bb932d54b3ad090314f81091e9e782a08f50347b6d115e8612395e1. 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/US8JA1878008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae40d075533dc5b0b86748abf7c31e44a413c6b49a047749856dd9046f5de6c. 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/QM84B2367001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf6054fc3b1bb1fca1b918684d1d91129929724d1813d379b48fc01f0eea293. 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/QM84B2367002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5014681e8922d6ee703dcf20f2a8bc15aa6e280bac1a1f9b0ce06da3cae1d45e. 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/US8JA1878003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deacaf7b2fa64c1ab8396188b74c79f342a17a69d1438a3f1675fedbbed103e. 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/US8JA1878007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dafb03e203f51a30924f6c221de4f9739090718d574a9aebf1e1416525ab0a. 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/US8JA1878001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291fcdcf7dfd34177db355ee0c0c13442c4416ec9fc0b0e3f66fca2eaf96a320. 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/US8JA1877001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b67eee77decdd588abd45bdfd1d7c456d41ca33c0bad3b9b60e0150f346df0. 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/US8JA1877002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a613b19d90dafae7a46a7d9cc8738177c2885eb06ded87086dc24f3d3b5d3f. 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/US8JA1877003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b36e19595c92ae365c2ce47257b3df5c7d71539a0891bdeb107f1650d57f0b4. 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/US8JA1877004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ec66ab9f1c1253f27d689935b6619ca97851935d5216156ba77dec4a1ed110. 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/US8JA1877006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c9f3c2a780dbac48732bc74f216298ecb81e17dcae86d2adb2300e6b837a40. 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/US8JA1877007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f04e9f8e4c7816ef4fd94df6ef32802a81952e3f43fad2b36db85920bd916ff. 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/QM84B1822017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cd2c5d1fa16f51002631f3a1fc9adfe4685a5d82f92b35c92f1c6ebfbeebcf. 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/QM84B1822018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f99f413cdf453a45f37ff1267dcfbd7fd2eb6ad1fb99d7dd5ce5073f933d55. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM84B1822019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca886bf56b2ab0e970128346377f20f4b7f830659acf60f804542d3ee86d08b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM84B1822020.