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 0x949616d72bcbaa8391bb1aa3c4059424c9c8f470d5aa1d5d09d125335c51e835. 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/6af6fdfa-80cb-4958-90fa-72242b54fce2.json and https://artists.proofprofile.net/proofs/artist/6af6fdfa-80cb-4958-90fa-72242b54fce2.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 0xe98420c0c8a594da687d28aa1a6e94e1c428ea6eb89fa3c0880e38f2a169796f. 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/CH7812349563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf735df2e59025636b49053cbb501be53f0046e8fd174e627ded6ea8628d3096e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLT2H2100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e9487e38a0b702bf1f92c62aab54f78929b72655e4458b661cfb4e91df2368. 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/NLT2H2000387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfb985750e4cfe92787fc856138e91b605c825997f8fbc6641acc622d4565b9. 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/SE6I32482852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6bab54a1698aac2028bb86ea0dcd7548265ca270bcb0d711f73cb9f8c9b2c0. 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/DK4YA2273301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3f0757424b80a916f59873525185719eeea512f9509cbd4e2197311a23b45d. 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/NLT2H2100953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2e264853e8b62499afaee04b250ad9d91d13510e9fc1e996109344b50d1efa. 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/DGA0Q2343167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b22c0b68f0aa1d5fab85e8927a734838602c963f1573af4c67f34eb2abc76d. 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/QZNWQ2133560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd138307561fa9010b7544124f48d1a97e723f49d2d61b919179cf2a0e8de597. 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/CH7812355794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713c684e56d11aca9b3d20c323438fd0068534ed93a0fbf5c3bfc43874737ba1. 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/NLT2H2300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b09e1071500aeee215874c5611197937eed2f73c5cc55a6329846100cec625. 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/CH7812235995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25506a4fc784e48c4dc37c97827abc64f994747a0b70d647bbd32f463195824a. 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/CH7812214574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e664f6d72c5137ae14e872629b27adfdeea1aef4e943e2a1abd920e93bb2f8. 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/QMBZ92198443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763c62dbd983288d402cb465b89df364209bdc2cc007390896e499a63a889760. 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/NLT2H2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b22347c53a1971d2124f661d077b08a1ce7fc0cdf457c67f32126c8e3b99654. 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/DK4YA1912303.