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 0xfc4fd63e5135151559fc357493632b306440b10a43993c1cb5172cb62aa13fd3. 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/f915cf35-98d3-4347-ad22-fc9987441abc.json and https://artists.proofprofile.net/proofs/artist/f915cf35-98d3-4347-ad22-fc9987441abc.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 0x6c9380f35fe4accd091985286d20eae7917b367f662aef58e4a1ca5e8b70edff. 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/QZ5FN2416220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50df46b0da3896168ec6615eeb26d54c992d7e95e81157329fab131001b26c1e. 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/QZZEB2329305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67926f5d4500d1c3b1d98a9c8e274a843ad4e4178d56a743f45e92dbb9f8c4f1. 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/QZZ8B2335153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e93f8dd94f4b0850a88311aeb5b968817e0192590e3296ffecc979a408ad8b. 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/QZZ8A2392771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909792dfcf18da56937ec04a81b289f3fd73ae52b3d4029b835ecc0d7cbe3a51. 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/QZZ8A2311808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa00b067034ee0a89c4363775ad7563cf65ca8bd7bbf41a6c029ca5cac1c3a4. 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/QZWDD2388890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecd3bf21d55a440e2945ec58b6d2c6019f6ca74a7519adfcac25ba2d54b052c. 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/QZTV32393333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7240c6c0140faa06b098fa3147e85a93b4ecda71ca85bd638203908752c1a13a. 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/QZTV32376939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec455b218c35fe659ffbca3cb55bf77422bd6d42e83f3eb87ef752edca909f9. 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/QZTV32349580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf800b1d174f6ba141a46715bffcfa446164c1addb06278471d6254eb6e0c03c. 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/QZWDD2329990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d80e1980080e3604b856f9e7c881af217ae878d7378a403942d305738f7bee. 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/QZTRX2391429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0db4c5c11d4060bf526b36f3b2eaf3334b179c095fe484a6a77d736668f4eb. 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/QZTV32376970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f93f3d9bfe7422dd5516fd94683e1ca063c1e808ba117437d0790354f3f6ced. 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/GBWUL2320257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d7ce40cfa2513804ba7c36f7f101ba2271593a64982e5660979fa2c18f8865. 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/GBWUL2320246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ad0a89926003b1de0f49d4f76f54cdc1b74c86652a3549c26090ea64364531. 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/GBRKQ2361781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb812871d38a5f2236d2d10700a9f719b2cc6e39401c1e658dcd64490e8e292d. 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/QZGLS2303770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34d4f8ef12c527f6d336419934576465cf48d72d9670facc591e7117ff98678. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:05:19Z), 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/GBRKQ2361831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398c427d4006d0ea45cc731b6c24e543c5be39b9da7734e0856ae81bc321637a. 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/USLZJ2314105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be868e62dee64b56115291e7238499a828f5716fc697978cad86359d57e5883. 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/QZ5FN2373763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0d5e77e33ecbd2a53577796e19d6e2a03a11d72428cc72b3a9cdc20cb548e6. 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/QZ5FN2340974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239277893b134c2ba7f7c5f1b096016e7bdcea6d2f5c79c1da8f52488935484b. 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/QZ5FN2306281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7adf2a8468ccf414e501e6c280f6533173f62c956d4f70623ee3554f1b12b08. 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/QZWDE2212520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cbba1421e5fa5aa4b7e08f16fc90bddf4086a0af445491e9e8872950847a7e. 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/QZWDE2212512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b856765b51ac91da4372ce0225a184458d95637b59b3886afa609547049eeb. 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/QZWDE2241014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c1cf95c300f38b000056e2d56f06fcecda7490a7052b5cd8295d4b8795bd0d. 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/QZWDE2212501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5848123e0fc74088ebf198c5fcca9c251cd7ccc86db016d5e8c9a8c4bb28472d. 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/GBWUL2281671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f2b3fbba7172698a430c5f40c76bae4b0f0d0442caf3a34deea66799a20612. 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/GBWUL2259844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd336cb97b433ea544db9175891dd5b64fd33edbd4b958b37f6b3a2cec029cda4. 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/GBWUL2246486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4374022f40441d3cc0267414ae831137d5709d5fdfdfa9ebf660ed4a54f1c552. 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/GBWUL2246536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaba71aa0a6864a0cf48896c5340d54518076b8cdd6eb08f800b1e2a766b6f82. 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/GBWUL2246610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5417a027fe1c98186e9b25f24e82ecc0d7dad55bf54a1fd331fac4a8f2a3f4. 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/GBWUL2246458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a4092b1be5a230d2f2112953e4806c10ede0f6ddc26844421784d3884bde84. 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/QZZEC2482359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df37a2ab96788d1d4e5e7b46befddc853f0619424696a2ac0dd3ec7b2994253. 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/QZ5FN2529592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dae6ce3b4f8546722dc60f5c61497eabc04edec491129ada55d6af094447053. 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/QZZ8B2453946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d6471430a7e859810359f0120ee6a429af934c8b38664c930026a6c1cd3ca1. 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/QZZ8A2417298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb111f1809febdc841dfbbd9c215337c7d416ec0aef5f9e32f3c17144c8ac81b1. 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/USLZJ2484759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b18ff15b2f982918af15d74ab71fa632b33923267a1b79609f05cbf6408663. 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/QZYHM2408251.