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 0x10794d8c753df816ea4c432a2487b53fdc73831c321d80f6e03d6f81058b6447. 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/c15c43fc-22a4-4e31-a73b-dd155ecedf06.json and https://artists.proofprofile.net/proofs/artist/c15c43fc-22a4-4e31-a73b-dd155ecedf06.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 0x5616e38153abe78cc90f7681e52577d03af7cdfbf479101a625f03730976675b. 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/USASN2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604c065892a25aed3cb538e3aa2e6fb6014a9a216be007e92c493ef12aa4111b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USASN2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae37e95bc5ad2edf46dcf5eacc6675b63a96c46df6802dddb9a69056c8db97d8. 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/USASN2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f14ffef19ec2a4290b4ab1fda762dc3222808f753426326a444311c3075d1b. 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/USASN2200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc25a1c92eb2dfdc872afbf1b504897bf7f4bf8a474ccb838e9f48570ef0ad4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USASN2200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e2489cf0f2b206c3a19daf376f62726f75009d77fd087501f11e545906da41. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USASN2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aa2e757939b244f4d863dcde143c465d069e7d6e24e50968cf18f48641e023. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:35Z), 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/USCGH2195428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23db9c45e7811270ee16d5f629bc49723a98d423b2348248920a2d94391d73b. 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/USCGJ2091152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa1e610156a1eef4005f8ecc310b0a7f82f085e77d7d2f897f72579c69b0158. 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/USCGJ2091155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d1c1c37640074a28d6af49f81ccefc8a9fce52857cc7fc82b788bcc9c1da7a. 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/USCGJ2091157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a7527ce71cb4dbe73c67cd08af8cbb4cccb0dced4e715691df48ed03203117. 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/QZ8XS1911231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9a738e9d110dc8c354add67557cfc3579f1dd5801ad0c00ebb66c6ee9fd06c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ8BS1911233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7ad5b021c82fa482ae5552079dddd1eb94b16fb89378fcfc5682f72faae2be. 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/QZ8XS1911235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970e4b29c0d0becff763e2a4f5ccee6af58b9f1d1a3c69327ed6b18a4e1522f3. 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/QZ8XS1911240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1100deecda7cfddde29841ca9f62de36ef7d2b0430c304d877687eca1f6379b. 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/QZ8XS1903271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b8f617524e03341a696b422ea6a34cdf001ae6a29cd335a2dff59b685b5015. 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/QZ8XS1903272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e5fffc3312ea25201906ccc69712aeb0e20df8c6e3edaed2ea13c955ad8aee. 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/QZ8XS1903274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88f171be1632cd9fc00876aa4ca762a80b2b0af913666efe9323c05dd47c932. 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/QZ8XS1902170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb037f94d36fa62583e06f778a6258cc86d5618d02b7b7ff14c9f06f3ddf249d9. 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/QZ8XS1903278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db073f48979b60245157302ae87c9b97ceb53d74f1e94b02be1a2a55a6d72cc. 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/QZ8XS1932710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b9d6647a267239bef79d09186316291bb69669248ce28f4ff678912e74fde9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ8XS1932711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdd8286751be5eea4b423ab154cc300e3e9927cd3d2ffb70b6dd618fa8c3793. 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/QZ8XS1932712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa99660bafa43e7565560c845bde90a5646e23b278ee0b760d345e33e895f15e. 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/QZ8XS1811260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1584bdb61131413fe484122860ce36eb50b6878b69f9522a3342b5c65cb1ba. 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/QZ8XS1932715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbb2717c8058f6cecc85838be53b324a8b0bdfeb08189122884251e801f1d9f. 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/QZ8XS1810001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8c39c3f454da808fc89165cda68554e5d7d9f214dcfbb8cc2efe641ebe6fd4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ8XS1810003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaec45532e63e58a6976c25cbd25ac0ce62f0210129698c69fdfc4a791c4331. 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/QZ8XS1810006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c976834f62fdd5081088d91844e0521679902cc5685ac2e9179047f63b0e2f0. 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/USDY42377477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79029d0f41d79fb733455f022f12a0724f92ee06157e8954a2d9ebbf3c6f393. 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/USL4Q2258721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c165b610852d15cc51f981bc1a45a13783b539c640fd94ebb1d1bfc41b0c1ad. 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/USHM92130889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20eefaf572a0d4e1f7779e0bef2b35ed77fd157a98f1c8b14cc5e1d99b5c49d5. 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/USHM82167417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f718bfa0bbc6236c6c2f66bd5900dcb780d61ff2af64131407fcac25da07936. 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/USCGH2093233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a16def3b36e414d20a6df639c4de65a70669b55437ed6141e17a7967b4d0e9. 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/QZ8XS2001030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22baec0d4a1c4d1865108294bea36805fcc5399b4bbeaa2dad88ed7facd6612e. 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/QZ8XS1908140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafda3a0825b7a116f9c196249a0a6b8268f807cfd78af888ceb2f19825d943c9. 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/USHM81932885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46528d73410725db24dce5a4392253f943e7c17dfd43cac8db2a9900e5ab8a64. 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/QZ8XS0720190.