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 0x7dff498abfa4e16313ad47d7bc239e35dd86cb2ecf6b7b0a270818152ef00d3e. 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/ae8fa607-a602-4d7a-a9e9-10e31a1006a1.json and https://artists.proofprofile.net/proofs/artist/ae8fa607-a602-4d7a-a9e9-10e31a1006a1.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 0x4b2e60425153fe6a2fb7587f41682ad9b08e630fc219994d6823cd6317a54ec9. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QMFMG1534667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4502902f44f22245d36229ff99904459c35e2b5a68f1046d532cf09839696ea7. 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/QMFMG1534670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b99ef9ab02445535ea9312b97bed783fc71d6da54245c7f6f80ac3b58e6c42. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FRX201761475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80885caea1a0ed0543c6d0da2fda41e122f4d7f07a18572b0e9854a941a097d9. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QMDA71845655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080626b30ba58f5251699927e5ebbb2e23bd92d1a799cfc448c8bc0f133b4245. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QMDA71845656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984c39d132f9eed51729e23f705e51b772460f7f84764aace34e0e553b42938d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMDA71845660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d545893ae8b0eac6bee9f72fae93122c8bbf9a8c81c7e3566443a11ccf47ca7. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QM6N22043916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf861ae2f62002bb775345e28057604b14e85f2030fc1c3bd1fb85962651216f1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMBZ92093973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9273cd33bed975e424a811c211b839994e6db94ac55b2e4317040e1cb01295. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QMBZ92093981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b9df8561e9bf06d2ff2e79eaa9e12903b7f8b9134df425f55982bb20c49b27. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM7282099580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8400da3abbfdb4c18cda0a3d01f5310903aac8258a8802891c4bed07fbc8b6e. 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/QM7282099583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67feac8da26268b473be90a097b4e556d3dbce87f2dafd6b6cbb75fdd37b8062. 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/QMBZ92093983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0044f2db8caacf29f66a88c5e7cca91a8012b7fb093d1717e0709a2041da78. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QMBZ92093986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27797f13136345bae5e78e1957773baf41db33b0ad6b0cb7410ea5aa665a0ab0. 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/QM7282099582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80d9fc77bc187bc721e5a561f34a15e70c33e0645912606d1e277fdd217fa66. 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/QM7282099581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148742f74e32ad75e247b27e1838c0c4d165de41211f07407d85c9959fbb05e1. 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/QMBZ92094545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7d2f55cf652aa41c3379dddab60b5c34a49edca1933c8114c067103d069659. 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/QMBZ92094547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256484dc40bdc628188a80997655aaa85caf262d3ae381ba61541f499c5405bd. 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/QMBZ92094567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4267d4e65bca073ef5ce5cb2b8829657ff06c66424194719165f0a1ee078ac. 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/QMBZ92094587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5790bd6fb5de7f3ce6826d178732650e927d30c7b7d9ea9728ae6e4727b3dcc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QMBZ92094613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b19bff0d6943d141914142c34753d2b83187ead85e54e5248f93c8dae7fd8ab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMDA62145310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a06109e33f50aed860c462cc72d4979e71943d3e22b029e453d924853c2796. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QMDA62143098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a7cabc3c63f0e808095d1f5041774085375b68930752caad4292abe86b0450. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES71G2203605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599cf131773ad590061844f62fe98bdf5106bb8d688f0dc7b1d6a2f9dddb3d3a. 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/ES71G2203225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97150b8140d5d74493df31d57f2e633abb3bfdc6296ce18669b218a33307bcdd. 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/PTVI12300365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e986e3fecf3ae77b496c92da7ba9220864dee0e3943b813c88bea4585a1bcf. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/PTVI12300366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6646e795d16b9ed6700ac9ef1207c64b040ecb280f885a9da3ad0f8d3433dbab. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/PTVI12300367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43cab11720088b75b3d4821f8670e519a5d4189bd3d99168077a416586911ba. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/PTVI12300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e014729a45b7b880643bf9140f125d52e047258c55b6ebb0578a9c2cd16b90a. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/PTVI12300371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72454f12dd67884562b76f8fdd5c6e79f61f9a870b12f42e69b0888ce409e2c7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/PTVI12300372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d54c95991b291b2b5ff89ce32145225bd20fbf4db51c4f2e8ae9507cbe0bca. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/PTVI12300374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3567d3c5694ab38fffc87f5d7ddb12a070c46bb36bfc145e5ada302f8ec2f4a3. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/PTVI12300375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb00b9fa3b7402cdf576391f667efdab59045dc4916ccff31ede18596e47c7e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/PTVI12300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4397c135a2842bb0d7560dcbda8b44d3bce89afdbf6bb70acbe3024ebacfd17. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/PTVI12500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe767874745f72b99b91d2bbc869c8e96a5a4b2f09c6281f8bf3f44ce811cf3fe. 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/QMFMG1520411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7550db6afe0507c36dc8d73130f7529346d51e13ca1ce3e8517c6d027da268. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USL4Q1876286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb44d1eead35d3713d95de23298a4a87bedb14d73102741b630ef389a76c249. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES71G2330722.