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 0xdbc91f7e31a70bb27f9ebe78bd00e4c8c0664c8ba6dc950288f95dabc76f6090. 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/92e3eaaa-d9b8-488f-a950-092a45fb4dda.json and https://artists.proofprofile.net/proofs/artist/92e3eaaa-d9b8-488f-a950-092a45fb4dda.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 0x7ede34b9d3f23a31219ae8cd9ac42412990a1391d981eaaf6ad2ec3aad75c289. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:49:03Z), 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/USKC61519201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ef4ccaaf8c3e7b600b4b674c132e83fb94ea49863e08a481097951628b28bc. 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/USKC61822703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf0b9b9e34bfb56c44d93c5f2121855b48bfd25293ed2d8a4a1ad0930c99f3e. 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/USKC62001801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf921cecca1e986b42ef089ccc9cddfdd703c3a1deb8218ab150933332856c20a. 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/USKC62001803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead5064ddcf7a3358c4c43e8aa6798a633cb33c61ddf30ccda28511ff07c902a. 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/USKC62001806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8828a858dbf1e19ad2623f1f485a3d8b03a34c871bf43809021573c79b6506. 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/USKC62202502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d70f045372f76ef0f0124fbc95bdd0ac4666b228b383144591491f23633f8d4. 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/USKC62202503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ba92362b57d2feb7e3533fc570450081b38c0700152a1aac663ffd16c381ed. 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/USKC62202504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cad57e4a9cd5e49614e66ed9e80ca421d1d0d2d4fb9836774a0c5dc55663c02. 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/USKC62202505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedeb914bc01c74a49dcd07d055fe65ec74c7d8ac6fd707c5678eda1bccab746. 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/USKC62202507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef4ecab308161b60789f17878cd87716ef87731718db0bf6a789f97be849805. 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/USKC62326801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81979a393c9bc62ae484d5a29705508be75ead41ae7525464bec889c9af694d4. 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/USKC62326804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf57ed3e46d9083369a1b585b8deff161a3ad505a9356028d82dc3c09db16a02. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USKC62326802.
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 0x5dc55257a3388738c63e9c75d50dd2dcb9870b13f036a91a635927d436565ab7. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USKC62326803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63b1b625001e080faa4480834f662c06db66eee2b0b228f719b64c0c64e93c0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USKC62528001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16a3ac5946f0ce97a486921d98b60ed5bfff5754f79af9873e03c3b2afb3689. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USKC62528002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8de953f191ad91415746df1c0e1ac838c309d497d156260d78f5e63e86ee7f. 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/USKC62528004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35956bb941546fc7a9fe01d6b1d7861898293cdaae7e1f50fc7c589e5be41cef. 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/USKC62528005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f5c52ce686bf292258ec55a6de385d890af35eec3ec24c70b9de1fd29c4922. 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/USKC62001203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74b8cf674e38aa0bf041cb0b7f1068e8a8ce02e5a2f2cce4a5a6ae8e08b1def. 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/SEAEX1500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa001bbbd2a55aff918e79dbc02d71efb0d3bdb9623d530cb8aff81f468594f0f. 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/USKC62326701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa8bc140697965fbce0ea5d3916217fa4849b639c1a8248c8a154de7384bc85. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USKC61721402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c51f459ffe119f0978d4bed9b4a50e1d3873d05144dd65f7aade50f280459e8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USKC61821912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a7003613faefa4d8204ddc858e33909b12cb5421ccd18e87319ea552ae7f65. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USKC61620016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba24ad8dc845747ee324eac4a01c0b92fab7ae0fff030d37eacce4e3a6409dc6. 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/USKC61923701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46ce3cc35b43d82d897f1ae54120d45f1ed8351805c64a62c793526f790ec8a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR7JM2167010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9281282acd4811da28745988cc756541ace1a509b1e111e609bfe5dea82e9c. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR7JM2167050.