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 0x6b57b6cd0f15a1cdb7e6625e5e52be53eccc8b9d7898415904d6943eb453c411. 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/921c0d7d-50fd-48c2-ba05-1dbb6f965854.json and https://artists.proofprofile.net/proofs/artist/921c0d7d-50fd-48c2-ba05-1dbb6f965854.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 0x0918bb3bf16644a2c9972c2af4fde2cd063253030be3c4e9a5ca08d58bcbff89. 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/QZMEQ2412868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f826179e10aa32ba0e276eeffb62507b0686c7bb1c1b04477701ce65655233e. 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/CA5KR2452529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f214486e3a2800c83c0ddc3f896f9991208465e8a722d79a585e812731018a4. 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/QZK6H2437210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfb06674cb2e6492553f88fcb7e7740e7bb15f7c067ae7e6c3a5815cf4ee046. 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/QZHN52437088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea562b176e03f6050f4ee4c0f0360a45119dd69dc1e3ff9c10835f1c0681fcb. 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/QZHN52408569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88ec6cc5cd5bb23a350131dcb584caf1bc4b8a80b7e8b3a8e9e6e0b059eafd6. 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/QZES82427820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848f863ff226121230be8f4b8545cb7defab9ba9dd39d0a74cdf449a58a68913. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDA42465881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c3b0c47ce5fe11bd81a6de2544292cd8130db544b57c5ee452c69f55006f17. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZK6L2360828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdce0c149c196cfed310435340c95b2caa5a0519b52f125d946a7872b8caf664. 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/USLZJ2313478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ed0a159924907be91cea9ae6bde8ba99aa6672429de2d742b3f0f929667bdb. 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/CAF5R2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a6cc145a927c808f10fabf812c4f9b115629310257cdc7ecbd391ca0aaf112. 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/QZWDD2217377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9ec7912bbb3ef3506ebe5d87276236bbcc01e1374ffca8066529ececc7dc09. 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/QZNWW2272217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53318ea779deddbed2a4aa9fde169b1459217e65d0e75d18ae0e84a964dda810. 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/QZTAU2166960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9214ba2a4640dfc4689dd1cf285a9087f668afbc0bbf944f610d1c1d7830e7. 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/QZRP42173866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88df78a6e2377f6df0354f956110044f493c7605ee5685efab1cf909110470d0. 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/QZNWW2103168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a74c61c897b7cd16df5cacaebbd978914c1b7d332bbd4c4f264b69de24aed10. 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/QZMEQ2179487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458ea294195ecb19a967ae7f00e2f40a6c9116aa77d7889356ce5fc7635a9369. 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/QZMEP2126935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ace1c2aa06687c39c79e2d6807b6d8f7a29b07a9cf7258c3de10162aed167c6. 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/QZK6K2138958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929cb141bef5afc39a08c9e5955fd132f30632168f019ee5b44700e50a0ed2fc. 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/QZK6L2135011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adfe0848448a1638f79c940a26f2cc74711eaa247dbef50e98fae94edea36fa. 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/QZWV32419878.