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 0x6482f580ae46773308743369611ad4f2fd06d9b71c579b128ec3f4a062cb72cd. 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/b0fa236d-146a-4d0a-8380-43d7485c257f.json and https://artists.proofprofile.net/proofs/artist/b0fa236d-146a-4d0a-8380-43d7485c257f.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 0x1cec9379b1823d506f6b523e3de93fed8c2eef32d11d339b4a897a7034a64455. 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/GX9RC2525310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060c3e780a976351fdcae6db2702e1c225658c4fd5a8d7aca0aae091b14abd37. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GX9RC2525319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd094710d3cf27988122398ba68a01692d6ded75cf898daa3386f9cd647b4312b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GX9RC2525322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdded0cd78f3d92084ac4aae29818ee8c8d23f350de90a5118850d6d6cb9bb4e8. 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/GX9RC2525329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c230c1d818ebb598def861219f0577ed876a2b8c45ab8155f91c0606afdc0de. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GX9RC2525342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cac1bdedbb49cd968e7c01a1a487bcb14ecaa550552e77897f45e9f4f674bd7. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/GX9RC2525349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d581d796d7998038342a6b983fb7de575a01ea5b07edfc2fa82b7de9cdbf7e. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GX9RC2525353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c8141a4b31825a3b0fb4aed7e614ba6e3cefde84ad197d8a43ee9db5b7c720. 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/GX9RC2525354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbf7b45bf1361c023cac6571640cbfee09bbd3dea7033229c1454027b98a59d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GX9RC2525359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d00176d99ec0d86bafa1f9636957577bcaefbead47c64a57ea4ccb8df395c5. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-02T22:12:38Z), 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/GX9RC2525357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac876ff7fc8e7d3e4c62eb5cf6eec971fa59e1e70bb8908816874de7f68100f6. 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/GX9RC2525360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa4b4ba9df14d0eedc534e0ee617059eaa7ec30ac80346452c123ff30af9040. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GX9RC2525366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5567685c9af844e7545348e818d3fc5714fed8d23ff478016387facbf8c183d. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GX9RC2525367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcdd7b91eedbd94073a51a721e8e5eaf2e24a58279704423cea91bcd262ae60. 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/GX9RC2525369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f4d34bc36fc690a3e9eec3da245b99ba64a3e758fada55b71649898ecf5597. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GX9RC2525371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60146cca457f7c1b90d9794dea6c6652d4f80fa9ee8286362a1d496915b4f625. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GX9RC2525385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274453ca5792a5233b49f9c4329cf06e305958e6dc84274509a5d26df11e4922. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX9RC2525387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60acdc19df41752a7b73f9196432781cea3e99c773ec4b92a578eec45d615227. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX9RC2525388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3bb256a0d0f69c56fb32ee35c9af968074ea49e0c427822a50a547fbdebd43. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GX9RC2525391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd191f058a25b19d5de540a7d58399e2d49ae456f585dc9c4ecda910b8c6aa918. 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/GX9RC2525395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c26fcb9ff9ade23b9b4e20327e2cde6d6db2c930193e63c5bf6419c9f1a759. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GX9RC2525397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138c33934202da86e60f18c8bb3a448096dd1744f4ee07852ab226163c318693. 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/GX9RC2525398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4e97fcda34ed3f1e29da79787459cc92e4ca1dcc9c73936dedb1682713d9f0. 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/GX9RC2525402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bd857516ee2e9107e077e6cb86ec90ee58a156f795de1f3404dd5b5d7570fa. 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/GX9RC2525400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c21191105eae54a94e511c142755097895b3bd3f6f570d2f25c7c8ef7d5fb6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX9RC2525410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4a547e892ce493fb042055353c470b3bb4337f9d1e7220fed3b89bc047069c. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GX9RC2525415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeadb4b15310149a4e724da8bdfc0c40afb34b12a3aca3e5cf2dbcc7170e9bdf. 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/GX9RC2525413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd252b7d6e69f497d1f00dc5f6d68de1f892d5b73b63c9e4e5fe041e42f994903. 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/GX9RC2525416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4261fbd1107607f812374f3b895b55ef4e32d175fbf33adfe07f6f65b95b9d. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/GX9RC2525417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e018ebec5bb445084a615b2f2d72e097f1b80bf5bc5ccff5d0eefa4d24f264. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GX9RC2525419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d35711463d3b6cbc8b35bd8c0748f0157b2681aba1a981e17747761fed91719. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GX9RC2525420.