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 0x4a8a6eddc53d4661a68ae75da2a4d8dedf75f3059fa4c59f40b517b6f40a1fe0. 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/008a6652-bc87-44e1-b070-c4469c3bbb9f.json and https://artists.proofprofile.net/proofs/artist/008a6652-bc87-44e1-b070-c4469c3bbb9f.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 0xfdc8af1f26163040535c7d010bb576cc17283d62bc8cd9e36c8c50c047b0a7a5. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/US39N2313032.
Là ai từ bỏ là ai vô tình (Lofi Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae23459da3b6c6321c0d37cce333b195d21ee39164a705f0e512e7f2de2f1a7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US38Y2308908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c102f68cbba889ffbdd4f030db61dc72e5eff90b7b21256b2a1045994ba64f6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/ARC572404690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c206b561f8cfe8f40ac8bd9b3dca0654c799c9c6b5e944b1bcf22920636e5c7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ARC572404681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c291ecd91ab624e36b313ca5931c6926fc1dce402e6f98fe5de59a5e1b3874f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ARC572404627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055d9243fe6926d2860c646bd360d1d927d7948c2459c616473ae38704cd54a4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ARC572404848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335cd463775147e1c431eae60a6b59203e077bc617ec441f7a1725d0358c8c64. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/ARC572404856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3feecc99cc8b01192085d786c4b107ad3f43009884e38c68cbefd4c827bb7f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ARC572404841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c6679c998dd647d67cb1371beb858b31f7246cc541ef381a008b06e051f74f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ARC572404807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd1abd0ae2386715521d7e210bd5df61cad72554d1a753f5a7ef8703190cb12. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ARC572404873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95889cb6e453cf57252ff5f91c5f312e22c5e4fe144793323a74266872582795. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ARC572405242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa2eecbb0e24f9975971fb1f4c226252ab756e34e89aa3a150de0db32a7d8d9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/ARC572405028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed976e3e63abee369a3ce7c868a8c8f68789c28e13b891a1a77ff8948e9f0c0c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARC572405038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7f143ac3ddec82376ecc2529ff1a14f2da598686a384518d3cf46a8053b8d0. 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/ARC572405059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5868170d459f7102097075f370bd9a843036a53d4fd8e2b60f369b0d2ce81f33. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ARC572405067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8571021ef5cc9b8d0286c6bcefeb5a2e3f20f531ef00dcd28ee021a5be7d8c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ARC572405020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eea5cbb409beb7873f8a7c6e03fa9451a9ab334795bff853b72aa464a80bb0. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ARC572405030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0e84fc2471d93f21fb92c66fef6540cc62745708cd75fb700dd366b2024775. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US38Y2551869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c18bbeaea55d1a8608f9388a75e48993c496c8d92cdf9e1109c1ba57a3d1d06. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US38Y2551874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1142b3acd664b3083f5bfa37afe73a2883cd2dd3b8cc8b12c81570a6aa9f55c. 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/US38Y2508312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2ee432ad300c6c1c1c9721e2490fd5c6c3751f80398bd999a0cd1de81ac461. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US38Y2510696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade586592e3c3dee35af6488259c1709ffa3bd6b8eecdb77abd1e98ef917f11c. 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/US38Y2503624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcece56326db4be88327253231a6b2f351a19e3a77d447c4e4d681de8b4ce4462. 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/US38Y2503688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a1f2613b9ab0d735988c55c5e128620cedc8c04f19e5b96832431b4d29e20e. 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/US38Y2503620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd002cbf39fb63f9ebe2391a53e75a25e136bb95922f18a441d679e7ce211c59c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US38Y2503691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836712a6444535412115fc0bf3a394c030cab4d898348fdea87343f3f13ce47b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US38Y2503679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89240b7fbe177c41ab94f174076f8aeb3091f06e272d6735441b922c8d372d66. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US38Y2502427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec646b5d8ed2b9459e4803d6d90fa8858e05ec496e83e8905c1cf7c0d9b56996. 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/US38Y2517983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d548d4aba59ae6f292978525d58d59dcac94d36f4eed2d0fe6d726f23fa9ac2. 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/US38Y2517985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648513a97e4ec435368189921e3bb48fca045762d017b2da892195345a408cb3. 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/US38Y2501891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44ee47512f93d1d3a8fd8300c06ce879b57a595e36c0e67a22a6cc662458922. 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/US38Y2436387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7181fedcee54629a9d81bcbeb751260c69964312632d26ab0036c2f583f1a0. 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/ARC572406723.