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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2265aaa7dfbc22750ce5cdb08e986e634e6e2d597a8f077b10aa19571f9d1a9. Chain 2 (Bitcoin): anchored in block 953980 (2026-06-16T17:16:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ca0cb61-9be9-461f-ba46-55815964662e.json and https://artists.proofprofile.net/proofs/artist/2ca0cb61-9be9-461f-ba46-55815964662e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51ab18a94a2fcb9bfafd2e3029358bcb5daa9a3cfa85da6de7b18aa14a0e015. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA3D1510068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dbb106391d78fea184967eceae3a88f819a99491e2f2521297ade340a42ea6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA3D1510069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea716c9a203619988a2ccc5cb9303f3f2bd4437993ff310f0e10f80f5e270a2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA3D1510070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9024810df0b74f0306f5bc5553199c2fa596212954deeaf872751ca993324e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA3D1510071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d592ceed785d0bc293ecd8f91b6d9128bf488b3828cdf6f3499b7c3ed49990. 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/USA3D1510081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e6a06a35d66cb209cd8ec0ac705d5a2c02775329e9cb672da62237c496dbf2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA3D1510082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424b5b986d4c0186310b849b72ef964376d691950d22b12c7ea1b8872b6683fb. 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/USA3D1510084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc4e0d77d4676a1134141319fce4092dd5b07808335c1ec636dbb5356083666. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USA3D1510073.
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 0x20eba6344ce07d9e4481fe1e998eee82a78d03a599b51f9382432a13125109d8. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USA3D1510074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb92b50e9c8596bb76d72809405b3f1ae2e267855a4f5f972f6c7699de56409. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USA3D1510075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297ba5d44860d62e38d4b38b87c97a709dfd795dd64b390c34ffa1d04e7b55c0. 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/USA3D1510076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffeaa1b9bd500aff62b819a4aa254a4d49d51e5be20cf97c853ba20e3390cbd0. 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/USA3D1510077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5574fb29e602dc2ec3aea567fc3b6a730b94e2c7628202f45ffbf4747b896c05. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USA3D1510079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d16253a6a3d132b843e8c792167d38d59516fde71cb6397907c869a471d4e0c. 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/USA3D1510083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f2e57a03a12a8841f88ca5698adfde68c19ec85a76c096bddad601ed495c2a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA3D1210042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c296723a934d34b18b0832bf0a36e20c0f6ed81cdfdf29362d90eb155f6df1. 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/USA3D1210043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d8462cd9552e6a5a3853d7b6d1ca72a0aae4c4c89180fa54a233f8aa8c6f72. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA3D1210045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6feeac06192a05e2ecf957a290e323068ec853a20109fc8b8b5e65090725ec. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA3D1210049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6681a00461b184a4b4caf619a1cf1344f4a8332decbb2ff09d80359cf2560ee5. 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/USA3D1210051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9b8d658b33282cb92616bb59eac61276a799397bcea7053c457c5605ef8c03. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA3D1210053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057baafa155dfd80104c52c90c57274c16fa1fd59b46a4377d555fcf2878d22a. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USA3D1210044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a6105729f32b40c3014916934133978d34ef2bff402241f9ee2e96bb309af4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USA3D1210046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6497b19f94a0cbb9c49dbea1f7da85f4cc0fb3430c297361e249c7be52359d43. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USA3D1210047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a2c583c7148f3becc494dcf12651de22e8af1a8627bf02d0cf390c3202eda9. 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/USA3D1210048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9307f3d9d0483ca523b264e85436234e28d20e42c772b29f61d95973ff493b23. 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/USA3D1210050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b19064f9a3c1f0a52f89825e7f5caaa92bec22a80e3574d78ff074c245996f9. 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/USA3D1210052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0273386afd9ab38c058d775ddc81c034c4a3b47f56ce9624735387d803acbcd9. 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/USHM81416009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60dbb6b3bc780e4b846cc5cd01e5ebcac3932c08ef9d39b01604862a5a573da. 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/USHM81416010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48bd15905a15714307364c379778b5748fd5fab13032f566ae635a200dee12c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM81416012.