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 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 0xf6d39c00551c4d8274681b76367f9c9d0a7512d05da097c891238bd1581734a6. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38c2fd55-6133-4aa8-ab74-1f80bd0c975a.json and https://artists.proofprofile.net/proofs/artist/38c2fd55-6133-4aa8-ab74-1f80bd0c975a.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 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 0x6346047171e2653592eedd612379fb24a516a525c443e8e225681befdfdbe01f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEPI82220553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cf8e0265f404c0f73eacd7ee4b1a51b56ccf71080012c8fc2dbf8ceb52dd50. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCAHO2301295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6c7425ba68adf999344066e5658db5735b88f625e2951ace9bad60c8ab88cf. 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/TCAHK2393261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda84bf793c9f90e773afc5b3c9ba83825b7dd6d94e80b07cdcbc8c7669c0b29. 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/TCAHH2390644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c55f14b6c9224a827632507c9245b258a33254a3c3d62b66693a8c023e63e71. 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/TCAFX2121897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76c3f18ed72792f27c1e99fc496006feaf0afab4bed858104bcd64543e92001. 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/TCAFR2123826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655615406562a344930164d6bb5112486c921f20a19c4e5663b07ec56109e9ee. 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/TCAFD2032221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3095b49c371287a927020ecaecaa4bf7e5a13fbfd643d99f10983d5326456eb0. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCAFB2008705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcb7c7a1335919485c1abd2184dbd70b4db9a8c227b436bdbc263f7caeddc80. 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/TCAEZ2034278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f6271b75433e29149f092bfe9efd10f67e8f117b219041394692d5e946ba47. 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/TCAER2058645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69beb010a4d59fa9952cdd0eb751f50fe6992e28104cb232c32f30617a4d89a. 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/TCAEP2066940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47710300b715d66b6d09309bb39e296bf5f00ef8932427bb14a585d9efee0743. 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/TCAEL1953756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e41b52d7845e198accc57605d409bc4cabec9937cfca6bb84d414892a846d42. 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/TCAEG1929745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05964f6be8a96e3ce5651d8b653517d48158d08bea07629c5c8c8fb41eceeb15. 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/TCAED1998259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08f228d909ab1aeecd8ad07807122ec5723412558984cd3e97590129580d0c9. 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/TCAEA1965569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549c46686ff89abd56244d7bcb33de6cf8b7700c598c29b3d344eea7b4730581. 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/TCADX1867489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93758c50ebc93c1d083dd9e50445fc0cbce886eec63c546e4e98217c46c48e4c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCADX1800356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f03bc57a59c6dc15979cb1dacff31a2356782c25b68ef0c614f45d15b3c53b. 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/NLPM11825871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74463cff945f7f08d753ac627bedf04e4ea46b97dd49407e8525ee1b2431bfed. 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/NLPM11725090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f26b862bec3c61ea2f96692a8938d18e0ff97e698dfdacd1585b3e69494592. 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/NLPM11724574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1e233c4a5c76930d71e45eb07ffb95becf1dce429422ab31413ebdb1aa7844. 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/NLPM11724401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8d687d4b052288a89950ff8210ee62095406a5841906855ac6570629be39fc. 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/NLPM11724174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aeb5f93903499dc80a640a721a25265c4a4fc52d0430e567130d222704db32. 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/NLPM11724094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4a7cddc80815feae5c8b044e9f8fc6f27478200f9dbfe27f15eb29ffc57724. 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/TCAJD2591815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c173f42cc0e737d475db7668b8d7e248ffca8fb140eac730befc488da75990. 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/TCAII2491342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adeaf53bf0e9a18e52b02eaf098a2ba4f6d85fab916b10be08f0add47689e7e. 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/TCAIF2400495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f31427b9617bf725389a84bc45b5be1bebd22e721a9d0cdfffd4fc0ffef350. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/TCAIB2443131.
In The End (Artur Lenivenko Acoustic Mix)
In The End - Artur Lenivenko Acoustic Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d778c048fbc32ab71fae0434139e31d09bf95f62497b53be97e57eeddb9e06. 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/QZZEB2410097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f017dae39794778eba31deb9ffed443135f8e7721793c211ab8573292b0d6fe. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZ5FN2350266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8d57222abf7e363128a130c7336418f8ff38022b0ea8d991dca26f8f8a2d1d. 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/TCAJM2580198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce8a61c3c96e281fd3353ecc092c6d3997b8ec5dbbc4277c3269dc58b27a3d8. 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/TCAJK2575260.