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 0x52b8e117955cabdc3a95cfd9e02c9cc21f5edbb76066be9b0803855b9714a639. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/775f6525-c884-4a6d-9022-871bb386dffe.json and https://artists.proofprofile.net/proofs/artist/775f6525-c884-4a6d-9022-871bb386dffe.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 0x88f0a356b31ac4c22336dc21e8e36dc269a1066798c4c655bc5a4b87a809e2f6. 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/QZGLM2138412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf7a8b6d65d835b5ef9a3522fc32aa2030a391eca0ae9da9d2091294c0fe453. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:06Z), 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/QZGLM2138413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe642e3087203e30ceba2c94cbac221154fea1565b376f83ca34933ed654fc36f. 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/QZGLM2138414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42699bbd4e875258209ef71899859ae44ddc7120ad4bd0cfa92e35e5209b37c7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZGLM2138415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90d0d0f124d896169847573e48cef2f2c389a3048bf0f6798b34d6f797f6eaa. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZGLM2138417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760bcacd30898c360bf7ec651424fdca90f133fe082618c5f203c6403b1e3310. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZGLM2138418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71bf67cface16c5ef5afaa44d75ac5efa48bf6f60dfba45739ac8b936972db7. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZHZ52147958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf86d64e546a1b4f339aac97893185d78f37fce6cd1c3f917696bd77c3c11bfb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:36:36Z), 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/QZHZ52147960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e94db93f302011469d5ca688cc81562b65e101769de321199518d6b3c015cd. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:40:47Z), 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/QZHZ52147963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bfe1c92d1ee7e36b86a2bf5efe5e48d952104b1389f36b65f1ebf4d32c7437. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNJW2373635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f86ce2b73558e5ba1a12281005b6279767fb11b24fe40d70a7561c6fbceae9. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZNJX2372888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415ae596614524826b2e74446095c42f24f7e43d436fae7f73b664bbaf7d474c. 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/QZNJX2372889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433312d1cf7baaa207828234392b07efc7fc4d09228e1ae67a80030bed2fa785. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:56Z), 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/QZNJX2372890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0594f8238bd027b26476050c6448fc8f9363e45a1699ac751a5bc7921d66f0bc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJX2372894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125ca451e81c245c610373b3ed8030ea5ed59265b5ceb242a5e4adeb1ffb9d24. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:53Z), 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/QZNJX2372895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2528d424a6c86efac88ba54da3b23871d4067648c7c8bc072f25560678ca1536. 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/QZNJV2528833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e5dab47c2000fa7e55f734c89d6aed8eee1516274ecf419a0c342ac573d62c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJV2528834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abda60cf60101b635d90b1a65434b08101d9f85e1e88fc4cf67cc498b9662fe. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNJV2528837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcab83be118f9a91fcd7e87ae1919ee83a8c3aab3b055d45fe53384f6c7e7d8a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNJV2528838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c2bc7f9aab6a5c289245e750a927d6a15cece5149e08845ebdaa30205525db. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJV2528839.