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 0xf25b064e4dae09663726d685f1c66104d43386c9bdf3754822a4785940679d09. 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/afc10603-b34e-42d2-a8b1-8857e028782a.json and https://artists.proofprofile.net/proofs/artist/afc10603-b34e-42d2-a8b1-8857e028782a.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 0xaa255347e3ce4dfc4b23490788256b1284aeccd89b10ccdce2ec4721a1de67bd. 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/USHM90614387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83769384170bfb6a2e4ce584c47c4dab6fd0bc3cc235cc9709d1dbbe3879f90. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/USHM90614388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0d59adb58cf4f40d01f3ce98ba5ef79d331f137b6fa4b7c74a2145d8db142b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USHM90614389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845a4aaa0eb24114227cfb063cf2d00807478c7b985c3749ce3dc26f58de9a78. 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/USHM90614390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3c4ad9f01ea9de8ae5da2defd5e96b284c500d3d0d93246406572a8b329647. 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/USHM90614392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4d17b322cae965efadac9e8d13332438cdbf6e4680155b3d8113ab2a2781cb. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/USHM90614393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4e0f8eb880bb36ff3f461a376e3399ed7fc6fb4002ff2df60cfbdfd7d95978. 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/USHM90614394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0baabfb45cb580bcdf68610919234875b0f44f6ff6e8758fe5995c9f8c6390. 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/USHM90614395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa938789556d7ed2bd57a59b9d63c9e2ba18ebf89d61a6b7ce0a2a48c8e6e7ab8. 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/USHM90614396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030cff1de468d6bddb94e2ec2fa1bfaaad2f4066462b0f6ebb22f69ade8188e0. 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/USHM90614397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0351d233b7f9239096dbbcdf7cff397c6b85a30f14b93934729900357853825. 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/USHM90614398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0f368b26390c8844460fe14043f45f47058ffd7ce921ac30be40e3ea1bc623. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USHM90614399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc429477b9ec56e5992b3326c5b856b50689c64384e57de8d7df5b54a9fc04ea. 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/USHM90614401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb816430c684a3e9d6faa3a4501e06c742c7adc344893296ea2fe05f6aba9f9f2. 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/USHM90614402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98170e04f0c283ea819349ec9aea3f28fb22194bdbdbc25631980dc712e18eaf. 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/USHM90614403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20d4beabfea9c430831f4267fb5b615e1a38ffee25b9488e04172ad56fac903. 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/USHM90614404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1480498ad9f8e323b6e6318e2ca71bc73bbe636afe304b81a72019ddb9d72a88. 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/USHM90614405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507bb7d20e57a7132bf9f11df0912a3040ae1d1e1374c37b239066d4a172cfdd. 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/USHM90614406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498d7d7b2f444a31e46eca2fdb3a1c91b9f026f947aad70b5f96aef330741868. 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/USHM90614407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d47d147becd9bb6bf284d1c5856f6ebe02c6c514c4ab07fcd091f03ece6048. 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/USHM90614408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f62774562dcfb2d4276da646af43f97e49c4acb6fa231d9dce736056a8fbd8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USHM90614410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7005a9f9b19b2517b1896a8e7250c20d5a9776812c9fe68562fe14907a10ca. 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/USHM90614411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75b6303aeaa03f9491f9b95e65876b8a4599a8d877756850f37526f0c8fb4a3. 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/USHM90614412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3697a790175974ae2ea6c002129eabff5272ecffdce0ca565a4b2a3d59b2a36. 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/USHM90614413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cd129758b0d275eb54f34cc3c897c3d8e900f8564a4b149bd6e76e428ed3b6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USHM90614414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ac66f21be4dbb3d574b3b54e2e335d9a6b10fb4f09219bc544cefd95330003. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USHM90614415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3751a52c507983a4a3e598caa0466a3f2725ad77847ff2047d96318e61e711. 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/USHM90614455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55e5f56bfb86bd32b20615d9ea059b4ab27ca923afb0374a9b606dee2996392. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USHM90614456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf399a455b251325bd3260ec7ea26bb6fdc3754143a9c69c0f0e8447619a321. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM90614457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e9b26ff95fe7f8854f5b335ffc2a8aff2a734f409d31b47883a64bf5f688a1. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USHM90614459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666d938f42d403a5c0393607c5d7185ff6d56cf9a76948ab362c2458760918ca. 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/USHM90614460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3262a2f2bfe7f09a676429880fbf529db8002b14997140ccd1f7d9f890d5b1bc. 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/USHM90614461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd8fb38805397999d04b37763a48fb287df203b7d5be19a798e8f501681a0d5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM90614462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf554840938b0d9e0428c02e73b735f46326c9a2539cb5215882d0c76472d6ac. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USHM90614463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd40e68af1dff705f879040ce34778da7db63389c33156e696b280ee61f07387. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USHM90614464.