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 0xe2db1d8eca916c3a918ec872c959eab795da25f32750f8449705d4d3e029fcdd. 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/6fa2e501-93ae-42d3-957c-c9babee15660.json and https://artists.proofprofile.net/proofs/artist/6fa2e501-93ae-42d3-957c-c9babee15660.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 0xaa7c2b06ed6a33a1d9528071b55ce1100d7a42429a1ad14263c37da99e676785. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZGLS2276537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cc896104421ba8dadf6cdfc8ac0f55dd1f27be72c4af6e580710f9a15f991f. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZMZ92313876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734b149d2d3bb870264b2badadebdd8aa4ce34ceb91c44b0f575e504a139a3db. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZW9K2367556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f369c8bacb11858ce38ede89b331f1802276b719d4be29eca4af193243bb02a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BCFPB2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af2b26988870c39d40b111f6b8a57616b7d6089f7ddb71e506b966b04654c85. 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/BC6M22406004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b61daf3a28bdfeeb13e0a3a0003e5d78c0fc67305920f076804e05b7202c52c. 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/BCFPB2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734b90419071cd90bb3c6c6cc277c995fd923f921c876193cece812484d5e4ca. 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/BCFPB2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f369c8bacb11858ce38ede89b331f1802276b719d4be29eca4af193243bb02a. 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/BCFPB2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2eacb6755b68f0d1a217bc60b191b21356f60bf615799e577d2ff25de7ed0e1. 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/BCFPB2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3733f70a69bbc6a56f00c370a2a221f7bdd88df4fde93d7b17c7fc20f9d77ff. 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/BCFPB2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac02ce8bbd8ae5ae51ba8db973881517309451e9fa9718d854d60710c0e54412. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BCFPB2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe873a12f44523d2a03091468d6ba65288e4e4f8d5e8a4912cba84185d74cbc94. 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/BCFPB2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2056798bc77c6166ce1262d4cb7b60c7103cb82dc3850c736c584f14e87d6486. 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/BCFPB2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af2b26988870c39d40b111f6b8a57616b7d6089f7ddb71e506b966b04654c85. 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/BC6M22406004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6893c007e432cc3b64fe10617fe5f43b8c2364d59e94415e285e4565527ccafe. 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/BR5TG2400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58205d20022a7c113f6c6d54c80b65f9c80285c78b9357f50061c38010a458ea. 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/USLZJ2527698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95a7f609a99f1511e84c63f2d84e90d2458eabe63d9c02cb7d2aff0fa7ad76e. 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/BC8Y92400016.