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 0x997fc8d13ed56a97520f0d119f3bd14d6911524e31a7918103c81aad9c5b5a65. 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/80e7b5ef-9c15-49ba-bac1-1fc53dc04062.json and https://artists.proofprofile.net/proofs/artist/80e7b5ef-9c15-49ba-bac1-1fc53dc04062.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 0xcd4c81b646dab679dcfacc418246fefdd9918b34e7f8b7fb89d59cec6105e29b. 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/GBUM72401319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d5e012d01ec616dd064b7e27550dd84806d82202dfd6fcac6340be8f896720. 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/GBUM72401405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e4331980b5ac6d4281171a2c790ca364888a00e8cd80bb47f03edf75d1d72f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBUM72401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849c8cac7c37a7a64ce3002306643024b9f22e0f1275ef9f495d4f5fd8c16d32. 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/GBUM72401410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1eb7820da8c7edfc8c162d779096331087283888428c5b82af60c9bbf9a628. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBUM72401408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481edd98dec2d8c786a3acd395825d564aa9334b4d32a7d55b3e6a6173448bc2. 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/GBUM72401675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3075145d90f7960c4492b6e64a4cdc380884dc51fade349feb2db402e0d5e2ec. 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/GBUM72401409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845ba42fd9321589145a30c786e9ec104c757d7d901c61efba7264faf05c944d. 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/GBUM72401401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf37aab0a24d611f096dcf07bc559347355322788ebf305eb94337770a054561. 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/GBUM72401407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d5e012d01ec616dd064b7e27550dd84806d82202dfd6fcac6340be8f896720. 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/GBUM72401405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993809ef37918483e9140b502de908543a8d10fb978be9514d60731a805e89e1. 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/GBUM72307883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91235cac1d352e08e5f07db0e3204326a896113338bccb012784b8951b327e6e. 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/GBUM72307866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e7fc9c4bf9e1b52be68f8effedecfc03867fe6226e909dd2cfac768434ad1a. 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/GBUM72307853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5b28f00583b74e46f999d0a55887070d94ebdae5b600a4bee90e93486ab1f9. 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/GBUM72307882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993809ef37918483e9140b502de908543a8d10fb978be9514d60731a805e89e1. 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/GBUM72307883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e809e74bdb5869d2114ced595ded523402ca41abe55b1dc812e06c5b99ee9e4. 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/GBUM72204425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7782a3bdaee83945005aee7a644c55446747586260acb1bb040dfec4b172b1d2. 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/GBUM72207282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3837566879907c60086cc6c54c3f168512519a083c9e0cd21c9d1eb04f0abfc2. 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/GBUM72207281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e809e74bdb5869d2114ced595ded523402ca41abe55b1dc812e06c5b99ee9e4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBUM72204425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa731d991b7ac8cac27d7c26ee71cca71b9e583540a58802ed4afbd4dce1853d4. 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/GBKPL2280660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43ed3f4961e7cce7f9ad36a594ef0a782901ed1d09d1027bbfd78362e60f6e6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBRKQ2119040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd01df79532353f58deba007d0996db27307ae9a7de36dffc4e1c60dd00288f. 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/GBMA22154297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5def46b528d36c18c1c879e4ded2217460d56ff4ec5d2b19a6b203bee7903b. 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/UKXN21921347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bfc5c304194a6f0ba64ae4f3ef85808ed42096c7644e7d61f92f83b17ec776. 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/GBLFP2016364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bcbeb19f7a64376020a4bbb5034907f06a293002af284bd5aba80de8ddddb1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBMA22068254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f982093e7b9b41064e6d94afa92c1717306c4fc03e90ee5341ba425fcfba7f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBPVV2305364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb5e01adc6b79e96f22ae6cd821530d7cf913e60bb1a610dcf045fd53762b13. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBPVV2305365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d3a864ce16e608dc35f5b843bf356e8aa962d10af0c51866d35d14be40fbc3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBPVV2305366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4223cfd9823d9ca95665b6dc554a0e5875bc3cfa97943b4dcb22a98ad7c494. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBPVV2305362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c2248d0913d7c618831d11e74550d467e6f940fb0f15fbbdbec171eceb1003. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBPVV2305367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b943b2b060c6339e25444076d5f7ca0037ef6eda50084b8c153b4b84705146e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBPVV2305368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddcbd3dfad8841ebcee514fcf30b71970d609f0f3b901879f5488f678cfbdfa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBPVV2305369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bc7533fd3c4ceabc0b597275f88e936e7d7adfa4bab0d3497dd3579b921f32. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBPVV2305370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4676461f859e73c5d7cf68e9288be49b2aac59be544b85543219f384575ad5bf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBPVV2305371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d6e18bd8eed8887259202ff3f0bbf0effca771ab4ab4171ac0b5f61793e509. 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/GBPVV2305372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd053f8f34cfd2ed185538601be24bb0ad2587b5c2c585938cb4fbd9139c0131a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBPVV2305373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cac998f84b076df3f23fe7c83c5aeb7278977b76e05a6f6801a438f7b0dcde2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBPVV2305374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd41b67375ad3c70bd6ef9305258d75d7ec3437416b5e835cf17329496b92c5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72217587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f8d8056ee19c7730cc50681cd526ea96259eaa0920b3a99b14bd0978d018aa. 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/QM24S2200787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885df57f6a54fe7351edb6ad8804c7d0852e8be08c7744e561983df765f938d8. 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/SGB502248064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad88aa36044322adc769bbe84044d141243d2c5ea48e9c0ff2810d8bc45a6d60. 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/USVI21000043.