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 0x2989cd3eedf407b7cbd9d410a3d12cd9687e59c4bf782a8ad1b0b54729b1c5da. 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/813cbe0e-dc5f-4bf8-bda0-25ffdd3da193.json and https://artists.proofprofile.net/proofs/artist/813cbe0e-dc5f-4bf8-bda0-25ffdd3da193.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 0x8252caea9e9490f5cc5edcf98cf3db377ddaeba44dae0bf8875bfb39c5755e44. 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/QZWDD2417271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060e30d6b9c52d161c54f75e13b68adfe19cb56442b7b0f7756a3f2a5609cab1. 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/QZTRX2317132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5774cdacc66ec74ad84adde471299dd374430f0c4850ca8c6c2da92fb1ffd83. 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/QZTRX2317161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63371f9a398094a366cfddd96b530cb2dd65d22b0d2d7c3a8e863b38fe4bc570. 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/QZDA52284863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185ea9475217bebf8dd08fb5bbdedc37db29032c94575855c661a4e1dbec6679. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA52284864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe067b40da44087b2c69fbcfb7507415c25a20411c3073c552ad53e6ee7e0bbb5. 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/QZDA52284865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3982fa27ebee37bb7dc7034c966476be28aef0dd52753841c572e5606058d2. 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/QZDA52284866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3a513966411f7c81a01ccb120dd483bee4c8c980ffe5d1aaee56e0b5f279a3. 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/QZDA52284867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451b0c880118f5f1363d9c334eb14efd91960fff3dc35d46ac5cf3d31438a473. 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/QZTRX2356580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac77c27ecbdf1c723579c83159ce3e04fabd703936976c819d7984e38eeaa706. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZTRX2356583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa775c1e1cbeb67578b94567fa2366b00ddd020715bda848c0fa8c359fa636b29. 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/QZTRX2356585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9b22775e3d0f1b108e2bc06b2ba9c6c12cb0f2fe1622e0e731cc9c31d750f9. 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/QZTRX2356587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438e5830d7bf1a3ac9362a3b3c9fe33140abfc51f472b47495a2e35e0ce3b171. 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/QZTRX2356594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aec84be78defcb7c25afc6c72c0ca4f7021f789a0459930d91738fdb8f1a85b. 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/QZTRX2356596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ec1da00ad37716c74ce081e75908e66990708de51674c63e00579e83f4929b. 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/QZTRX2356597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1697f74de66aa691f5a623b1fac41b023f14f56d7ff9e52677e9fe0f6ce5944e. 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/QZTRX2356599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84c09270791890de19987d1f740b8b0ee9a83a310ba3bdde5179cf0953a651e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZTRX2356589.
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 0xf83dc80596273b166eb3468679684b1dceef37c8365c77f665ca76bad75e72dd. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZTRX2356592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04796c6721cb002109e1ade7c40f43f936341f7c28f41b7ea8a26730e768971. 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/QZTRX2444167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1ac0486a62b08f197126eee7a2e8c51f4a0c2ca208a3c63d2e4152c4bf1c66. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZTRX2444171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79263c5326cba125b93e81e275d9909284e50520a30f7e66bfda858007dc6f85. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTRX2444172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6472031adfbf5812d02970125d5e33ac526e4410c7ae6fc2b1cd8a0751245562. 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/QZTRX2444161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc016e38a240b4b66ae308701d8dc363725bd73c218ac57eae85ef8521474fe6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ8B2398036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b02ff7bb1c977e5c9f283e8fc6453eb5b46098f76462988cad4015e720fea14. 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/QZNJY2348363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252c89435d2cab9d5a71b5bdb86c5974431f1c2f0933204ba2473b91319c1bd7. 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/US7VG2351535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac56877ee3f45edb3ca3ba208ed81bd0e42e395bc902038bc11ca00c076af2e. 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/QZ5FN2318847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aefe6603ac72cbe0c659a787d22b055b62b048e556ec88a463bc49020b0177b. 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/QZMHN2238827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29489072b3a4ef41a812d5e8126bbbe965ccaea08d0a5f7f6e81b069aceb628d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMHL2248370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e4b8fdb5096fdf483dc280204c23c8b02dee224f0127b25ef3e9abc3310f7. 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/QZMHN2282225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847add9348debd581346777d3690256379d069ae942dd3bb3538f9f77af34202. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QZNJZ2136335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ee98525c0fec15cebc21919e4f19cb9ac6fe9e7a66066fe1cbf26213924137. 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/QZ5AB2103955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073446721434e019ce704de60ee7af772c7a2b156617ff790701909fe30e5b01. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZ5AB2103952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095c341a2c337a1c4155fe0020f620f1dab32bcb58d53667e29d7612d3cac6bd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZ5AB2103953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf16bc465db4838c813a4d864dfe7c06e2e3b524e33c3680a62df13e0485a74. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZ5AB2103954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c1177c851f6ef1b35af566f1cac17b63d9c036a4128a9b535fb48ff54f13b2. 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/QZRP42493276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60889a77ecfe82c1f45f7cb558d5a457051c116d3e841fe9c7e6cf79d040989. 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/QZNJV2486569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5422c05d60cebb5df6684ac872bef18a8f84fce4a6ab9f139ae0063d45e8ad. 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/US7VG2318643.