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 0x9af5c1a13d80d26660283fcab93631d699a61adc7ca89064e2a3d3ff9647299f. 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/f4d6eca2-b514-4b2b-b245-af097e51569f.json and https://artists.proofprofile.net/proofs/artist/f4d6eca2-b514-4b2b-b245-af097e51569f.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 0xd67af4d47200c32bcf82d1679f832990f3d97aec571e6d8adc514fc4da935a0f. 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/QM6P42325610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb573af7fa1dae6d52ed6851f213d7772a98e7f2ccc9360c76595471c4b9f5ac1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QM6P42325615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1967ddf85e6ed311808c19bf39bca4282e6c24b3556b4717052fed1882d50a8. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QM6P42325619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e5296daa7ce214c8c6cc036501bad87f801f7277f088122771cb6c4bd46581. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QMFME2290202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494814330933bc35b51741e0c98e28aa54e2de0078dd7752147dc9140afc37a5. 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/QMDA62206433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254aaa0bf6c6aec234e0d66d50e2e34b915360d987a33b2b9d0472e9889b263e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM6P42326274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb64c13305df1d8059f0e69516832cc3a2fb9d13d883a4c3b216676fff69bb4. 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/QM6P42326255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43a66f24a1b66c3ff11cc4d979dd5ad87ea4e03a369ed13e432ccd9bd2e2600. 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/QM4TW2352963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070a77695c51d0f10f4954cb3e4000a4ec586ef684d1177d75b3ef92d7d6ca42. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMDA62242759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2f018cdcfb81b68569a2171532e4a21c134115a6021d486f0366f941e8b8f2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMDA72266517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11455721ca881b5b1a9aa4c5beb380eafdc77d73028a960e8dd394629938b90a. 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/QM6P42326260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3384c1fc42794341d6cb97a9d3dcad0d0fcdea7fcd22082521601257dc52521. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QM6P42326265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630ca50928bf4b797a9e77183a3b5fa5994cf7c232ffdb018c7d633234221130. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM6P42326266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998b6fa6082cb7cb4f871927f056d5c820ec8915aa0cfb78e15b8e3894ff62b5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1393107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0b1a16894bfb87daf20025cae7b69ee58a6195054f2055a5d671981d137619. 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/USUYG1408796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28399630ced00c65d32d8dffd5316f39033d2e76066ddaa49a666b0b5c4490d. 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/USUYG1416070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b99aeaf113c01cc2c8aa88553d3642a3a219a4676b71afaf71f866ce71a4193. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1416071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f9aac0ab741d37b65595fcc8cc5319e8d6fc94517a3950b4be497f18996087. 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/USUYG1402330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b75a709e1912c9c798fb72f8690070e15e9e2b9e26591a7ea7de94350b082e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1387240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c16b79438a40dcb366c2198671348bd0c22cc74d9b2357d104af5f237315f9c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USUYG1416074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98366c95d884aee928fb501d536bfdc7cad92493bb70072b3d66792fede8f2fb. 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/QMFME2312998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e5296daa7ce214c8c6cc036501bad87f801f7277f088122771cb6c4bd46581. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMFME2290202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070a77695c51d0f10f4954cb3e4000a4ec586ef684d1177d75b3ef92d7d6ca42. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QMDA62242759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494814330933bc35b51741e0c98e28aa54e2de0078dd7752147dc9140afc37a5. 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/QMDA62206433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493ed7e4e313f0eb63923297b4c0f601f09caa2e750ded733f535674d8abe5e1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1409018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0b1a16894bfb87daf20025cae7b69ee58a6195054f2055a5d671981d137619. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USUYG1408796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f9aac0ab741d37b65595fcc8cc5319e8d6fc94517a3950b4be497f18996087. 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/USUYG1402330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998b6fa6082cb7cb4f871927f056d5c820ec8915aa0cfb78e15b8e3894ff62b5. 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/USUYG1393107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b75a709e1912c9c798fb72f8690070e15e9e2b9e26591a7ea7de94350b082e. 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/USUYG1387240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2240c3717c38695d0b5260a2c8c80da58ed3996229f4941fe40b95b32cdd3330. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMER2099137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d285b306b352ab28e87841a5d67f390f610f6bfbbe760988e4e45f32960f1d. 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/QZK6H2050735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a00292fb072695770d259d465cacbfd3250ed76670d3afa06c1849c4420edb3. 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/SE6A92046390.