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 0xf0a57a8cc16319b789e4a8b0369ae65c4bc144571e13201e02a4e238ad473a24. 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/ce675af2-26c5-4ce2-bf01-9e2b1638906e.json and https://artists.proofprofile.net/proofs/artist/ce675af2-26c5-4ce2-bf01-9e2b1638906e.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 0x753fc29825427f7af96b5087eddbe3cdfeded38281801b9467fee43a829d827e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ARF030300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3c00aecef560c45573d7738caa4f5c60b4ccad613a1da174481e538e974ec2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ARF030300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2373763eee8f48d19ff6755b066c574ef02d21f39fbc9c5434715d41c71e5c09. 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/ARF030300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1de515b8335200dc97116428129208d0d933cc251fbe6ca4e167337ad604f8. 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/ARF030300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710e4e4701fe9a3a01336c4a2784325a2cfe5a46ed350c22de214081622f1b28. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ARF030400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa509e63247054b93fbbfb637ff6917115f978a52e00a404ca61a005583849606. 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/ARF030400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac09722c1694827666cfd2681c18d45937e30e127fed4397116f0612bcca7842. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ARF030400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c250458afbaf4fa0b2b62aa1cbe3303fa57ac2acfb55145b42ab41081c9882a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ARF030400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0587bea356e2a4de05932f8f2dda44006e25ba6fab02570f5821cb82b17c08. 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/ARF030400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93564d1655b756ce0f17dd3035b6048754ce2e6f2809a90c334f5b4932a98801. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ARF030400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bc239df58883c7ad9cee0605c7eb70d75e3927bb41cfe823eebab733423968. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/ARF030400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb8fe9ad1bbe6c239e5f26705721ac7cf7051a290622b7dadf45f4c215336c6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ARF030400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b49d31feb3f5acc6cc741ef04b18fe5769dca599e370f3ff574d0592fa60e6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ARF030400182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc22df982d0eb7eefb00ed0cb23728a67e0f5c2e7aa234b3ea06dfc96828eec2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ARF030500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8406c81b8bc0f7ac871ff5751428b216a33e71417174b32f563967740edfa9. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/ARF030500122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70d01db93fb61f5cf8d51e475c723474116eae52c06567f8df65e6f5a6b415d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ARF030500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf770a00a29462d58a32c03795823fc2156d8f450ed6a68322e04a97aa2d883c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMBZ91735689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4714bdd34fdbed7f9f32d8754c7cdab44f640afdc743a8e53b82ac31fc2cf99. 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/QMBZ91735699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b46d10a347faa02325cb3d69a894e77607f661458a064ea238fca4b721ead98. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMBZ91735717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571067fdd9c39cee50643bc1c30947faa4a48fd3248fdaa8cbd1fb44b5d2aa64. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QMBZ91735733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c67926cc50d575eaa97feda733abe8d3e1bd9017fd31d8d6c3bf7bb88d8f6e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QMBZ91738978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e48208eb4391193d3c1b03a8e3791ed8ea7ee35807b46b730f69d5bc029551f. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QMBZ91739004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0899dfd4b823b3558b7fd060f1ded09c713e6bd73dcd58be39f5415fe2804536. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QMBZ91739030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77233c73234050c36b0051bb0f6f5fe30c7846f03bbbf9678cb9d11feffc4106. 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/QM6P41750766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a369619f4cec06a1a1e3f4d147bcfe2a23a35b4d56c5c1dfffab2accadba81. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6P41750770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5e9151fdeaca511ef5e00e3b38900218cc838885e124656d22716c280baaca. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QM6P41750774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789accb5d2e6baba3a8ed8ac64e3f42a02d6eebbc0d2a3554a7288758ad0622c. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QM6P41750778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c85f8d9027cad83f12cc3abec8e60a9886d15d6061c0367f1490f2b6680dc44. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM6MZ1870624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353e334844ecaff40dd36eea189ed3cb3f29dd90d8e97f495947126f5a280c4e. 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/QM6MZ1870656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f25417f009d7222c24c965bf72eda784b00a5ecc44fb819d15ef02f7bac0980. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QM6MZ1870685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35070195c0be1990682f34681c01a064852ed60c168f3bbd7d638c4db18df75. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QM6MZ1870695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723218c142d5ec04822d231e7421185fb1bef901b26c7399170c4952289dd8e9. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QM6MZ1870727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b4596623d71b7e02a3eae2ca0fe158cacff1938eee9adcec624d11ec74a038. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QM6MZ1870830.