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 0xa12a94ab751ed8333aff22f8a3bfe1502239244e3237ad0d244993bc83c1ccbe. 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/d158107f-8bea-42a8-8edd-fbde6d2c0953.json and https://artists.proofprofile.net/proofs/artist/d158107f-8bea-42a8-8edd-fbde6d2c0953.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 0xc38c8b6e239727b6bc1c835d1367b8a86ea8f658d9b62562d99cf82d8d298e39. 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/BXWC52300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b43e959f0fdc474775d52fb0018a8475c12192dbee170713b165adf063580f3. 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/BXWC52300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd120791cd5e783185fa4147a6187c911c628b218a510cf7274b2f5d67466f4e. 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/BXWC52300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5ae084f27f7baf116c4ee2c1294d09ba8b8b4b976dc18b234934f41a719d2a. 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/BXWC52300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810ff99d5af78f8e1593f91054764f26b3de92c88fd0cf8787608e063ff526b2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXWC52300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a28c5cafc10065174d57f71ff1068dbdd0be38f53f59913ef1f69786b3f2c22. 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/BXWC52300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d68953652be225ccff4300ba4962ada2fc95a95ac2682e3ce55ae41ba0d1fc. 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/BXWC52300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e36d6c1ce13a96a33acd19e7a99e2ff788e57db2e75b0eeb38c78d451847bc. 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/BXWC52300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd741e72e0500de8e69d2a97dc401196968003cc1c4a10fa28f1afae069d5bbe. 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/BXWC52300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc744fd1433028856139aa1d952f76d7dc4ba27be78a33c9dae8b9c8a9463da. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BXWC52300039.
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 0x64df83422f956bcc110e236b9b4a9e5acca46f5c959b330f2817577fbb04bbf1. 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/BXWC52200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127d86e496bb85a66604b9f5fdf550c0d885d54025a49348acb9b7b45493406c. 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/BXWC52100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8abe34fe6e627712f6b77e1e926686c16e6cfe885cbb0f45d821ea937b4a023. 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/BXWC52100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29daaa67a1235bc753798dfe3ea11551e65add0721ff96356296b85247bb546. 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/BXPYA2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b3863cbe342098add690e283403b7022689b7eb4f72bb50f66eb89612375b7. 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/BXPYA2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0919d0b296771529eaa349f8a2b8ca8b243aad35c2654d64e78c6d56f18a0e8f. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BXPYA2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5b92d291ec3d9afd216d37f872b61b346db5fa6ad14864e1fd64be883e63a4. 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/BXPYA2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa851a238908418b121887012a22651ad105ef92063d871383be33f382f45cb8a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BXPYA2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a42d415a8a918a622d34162248cbf8a2038b255686d63110286a60d7c154aa4. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BXPYA2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcff308be48373adc07885e667e6cfca1166a504dbdb2bdf1c33480f4ddac85. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BXPYA2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384281b2422f00eb96834b99e6d9142e8bb0af1c4327114c3eb6c39d5ebd2a6b. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/BXPYA2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdab3147f1e58829a9a5289a5e827398622a8bb34eb646cd720afec665f8435. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BXPYA2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe683e30d8408efea9f26b05c516350fbc855592de7a88af0c820918a3cb738dc. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BXPYA2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6342eb8a585717e72402c26c83ccb216820dcc49ce9f79085940f8c6760fe20c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BXPYA2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf591d2f80334d556cd99a6a07ab9efece0af5f57f7c65ab8f2ce24cb14d5cf36. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/BXPYA2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e34bb4ce757c13e627b5d1e9676c80878029081a224df7943f823bdd6cb436a. 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/BXWC52400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef82c4f8ec4c57bc3134ac265d36ade8696fa8c5d3aea7407f5fa38890d23a78. 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/USUYG1537449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5224af46fcee6bb032c95ef974b5a18e7e4120d163956ba1d1587c4dc8c4540. 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/BXWC52400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd6222394316fc5a84ab3aaf1e55d524ce3348959418faa56fe9ae37d0c176f. 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/BXWC52400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b6a53d938d8ce38183e1367ed852a8b3e18d63e8990bbc8fc108338f68e011. 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/BXWC52400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865fc86f7746689006dc50afeeb72e720bbec89641e792a779dbed93b29d9abc. 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/BXWC52400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf105898a144588872015a90f24224792fce5e03962d29fd639e0de6d2c4d13ac. 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/BXWC52400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a23ca8af9c8fc2889aa273e8a68e31b83db212f19e43656f7b272a9d6866b8. 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/BXWC52400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27602988d89e5e55b03a2ed6ede887b855a4d2beceaf8b9be292bc23b284d8c5. 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/BXWC52400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd416ccad65f58b1873438d2efc05f75f456ce4302313135ec1a19ce5bcef69. 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/BXWC52300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fd8a81f24e444f84dbf71cecdf0ae5d8167fb26e2bfbb4ad915dee55854655. 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/BXWC52300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d14d506ecc4470dcdda49c7ebc273dfd9c9e9d9e64e0603fb96fc248632f6f2. 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/BXWC52300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4297ef47f3268c21a7141171443968152eac00bf433687248d97d81c8389d2. 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/BXWC52300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae489e789cef28ec8ec14d5861a99fd2ef56bbf9630316f5c032296a887ce0c. 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/BXWC52300070.