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 0x0e1c36c2f49694efec28d83b1b5a04af7bba3610edd58e9a897f8fbfea501733. 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/82381a70-efde-49dd-a051-a678904c658a.json and https://artists.proofprofile.net/proofs/artist/82381a70-efde-49dd-a051-a678904c658a.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 0xd22ef4fba2735ef1f1b79a0d31107bc44dd77576aef6b90ee449e5ac1e38a40b. 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/QZDA62346884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39414310346d1ec44237b5e43f03c7a411735ffe94e30efbbc74f259cd370314. 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/QZHNA2164919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87715e43f4b4dacff230b3e2ffe46a03d08c7896bea802495854c8bc9a716fff. 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/QZHNA2164920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0910f420ccecba1ce0491ff140d50908e393c60ec521c6779f360e462979caf. 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/QZHNA2164921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecd180494c0e67874a053ef5577adaf3205d0450cbd33c26f29a226a8cf3e70. 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/QZHNA2164922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c163ad3234bbf806fe557f562c4a1ec54b1aa3f180fc2c8c6d81ed1451382cb. 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/QZHNA2164925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59461f6c290c1fddd13c8800c67e0b56d15cb3c8c8de55d9d70c0c89f1b3b7e5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZHNA2164918.
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 0xb341ddc41440c10dae1072db2c5af58d43a1c70f0a71191385e1aa15a3686e22. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZHNA2164923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4bc2e39b0d324e9666f8ef65acd1366b40d2099535607f7227279915c6e366. 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/QZNWS2034256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff79380317a16ae101b570b3afab8d17408868c3bc7080e5af98e49d7114f38. 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/QZNWS2034257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc327affb2ad01e9b25e3d2a4378ce5344fd3fc711e98b6f9a771368d328f6aa9. 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/QZNWS2034258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16eb97da767719d9ef3609f6f29ba64fe485b7495b4baa228bcada2c0e98887. 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/QZNWS2034259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fb6e39454145c9f20085c3fbeb76f6a62c67d7adf8d9504612a3722f53af76. 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/QZNWS2034260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32ba106d1f0a7826a2c169e66b4177366bcc8174a3ef08dc4689742496a9655. 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/QZNWS2034261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9941aebe3cbc49b2fcf9d6a60e9d1c348b246caa76cb63149d2ca3ce0f2d4946. 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/QZNWS2034262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe459b5f108dc1045586919a5cecfd84c2f5d4f89d50098087f1df555b7e6e393. 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/QZNWS2034263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ed7146c2a65ab3a46ba33fbc388d76c3054ba1524d1c8699bfa67ff994ea4a. 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/QZNWS2034264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb015550fa29873a56b75734858eaa73222c28e1a61ba311fb98cc6244eb7d3. 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/QZK6G2003361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbd25f3ef2fe24058e598d3a8a0dbaa32888364fab6bec3e08c549881bbf2a1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6G2003362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4eef11be75befee27d99c994db738b6c7a92b0dbf007290853323ddb8abe38d. 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/QZK6G2003363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b7187d31689c8b683ddfea71c111e15c7dfd2711df415db7ec6371197471e4. 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/QZK6G2003364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504e7843b61d3e6cacf25f257875eadce619cef6c67685df4621dfac7caef794. 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/QZK6G2003365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000f8a9cf34e8aa36d3bbaabada79fc1fd44c75738efc339050dbd7cd081f7b0. 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/QZK6G2003366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e085053a65538acfd36e9bc38deeecb7d4f2af8b2ce90a7c4482b1f83e047c2. 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/QZK6G2003367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8820cd7e1c90d6285fc6a4947a82825a04a990dd46b24b68ee465af2150a57e8. 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/QZK6G2003368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6450fa0a9a91b025926323fa45b1016067c368bb1e6a9ff3327bd8ca38c4625. 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/QZK6P2382991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd2cee6c6212cf5528c511723f321625a33d4026664da58e2380cf0603562e4. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZK6P2382990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb948cf454ea0df0887862da9f734115594a61f6a547afbf389d5d0a8af27110. 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/QZTB52211450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14206767fbcc3224106345d0220415f71e1e37e6ca9567d62d2d5d05d490308. 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/QZFYZ2249407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004d568b1984c95cb68b891a3d4a7a92f8be3943ede80b16311fa8ea9e402259. 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/QZNWZ2193281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff23a4e732a921609c3a0b8e132cfd5dbe378ca4d4a175eb9722439fb118bed3. 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/QZMER2125937.