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 0x82d11d511437e359515d32055f55d0bfb646086f21d1cd3a5447c93e6a775e29. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dda4da84-bb05-470b-b49c-3a9a6fa32eee.json and https://artists.proofprofile.net/proofs/artist/dda4da84-bb05-470b-b49c-3a9a6fa32eee.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 0x36f62e95d532805f13de0e10ee63d9f943234c99e935bbb8fdeb6dc1b5edcc01. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FR9W12203048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2e40ba26a993ae95e84cc0003362582872309be88d8c8dae939f0e9e66038b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR9W12203049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb685092ce17006c745756859a7e27541952b78fcd20b4c40a4bcfcb1c8c211. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/FR9W12203052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eef86efe7eb29320dd5f7209f3f14917bd9ca16a754e6c5cf831c8ca9b31182. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USA2P2044778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc440cbe090fa791f948cb667972d3dea69ac9126a298d978b53525d623ec81. 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/CA5KR1906118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c18c2e9347c7ff9ee677b354e7c7dd7c6ea2e837e84fbc68433d1e3f6ce7272. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CA5KR1906126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9265293adcf6e52c84f16d8e38cfd9f4a064730a297071a7b0864c2060b3a8e3. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CA5KR1906134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa391697f1501a5908b93ee14ad5a867aca03377e7bed8416adf81af1af368efc. 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/CA5KR1906117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534855338e5938c69eb8a944d2e923babe29f90650a5ecc39083997d098e01a7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CA5KR1906124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d97ec04f98a1a4d675d7f49458cbe857fcb2cc8e06fcec69c56aab3864f5c52. 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/CA5KR1906121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936540303d1f2458751a1f832085c8f97ec37fe4ec9707941cfaf6cd837e36f7. 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/CA5KR1906127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0438ce59861373182d69233da705595ab9f7c5042ef3ebc79dd568bacaa0ba2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CA5KR1906122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63fbc790a781e83e709026b46c87756ac6cfe30284593ed63c4dfe172684521. 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/CA5KR1906116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf475834a18ce4be6cc99954aeb80d291fa4afd368a146bfcb5b0e14fcef3ac8b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CA5KR1906123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b02b5c4bcc40a96127f002c871b82c0cb850ae478f210b986fd1e9529de4232. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/CA5KR1906131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cce131ab6c7a97341e57676adb7214126c0198ede792032d468e09c91f0a593. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CA5KR1906129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78961c31bbcd9d042929f16101601ee888d68d03cdd8ace5ca54303d34d94bc7. 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/QZK6L2501411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8546ac91ca84076020275f69f2decd9b26de8a40473a988235e895783d4c5990. 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/QM4TW2121476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cd5df029f6287231eaed95ea6e0c85f78d2b8d8d2f94c87f3d493f829c3eda. 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/QM4TW2121477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15e7cb770de089f0fb3b4da139bc21580325f8f10b22a43b93a192154ecbff2. 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/QM4TW2121479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ec2a3086baedeb593f63c047986e022175005f3030a665c00a0038c932cca7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTV32244347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d63f05aa6ea6a27cb6f247de65d948925c2f5699406144e28dac705b6d6b27c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTV32244349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1deecbe6632359232c0c49dc744050acb38d8f2892c404c91e08d840911058a. 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/QZTV32244355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f351e806ea74a535dec3d7e3c7a55cfe1cd5e150da40a505f3dd717a6a9adb. 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/QZTV32244364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080e1de42a11dd253c03c55c16828613da03edb38a80afabfa5dec2e8a105723. 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/QZTV32244365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9ae8d2473cf0dede159665a5cdd4756dc8156f7e5a5f57368e4c578842ec1f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/UK6821729163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976b4e8b0e54c9d86f2aa3a4b21d1c9cfefd03852e9708e74fc365d295765bd2. 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/UK6821729164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e73b6cbebd8df71f4d6bf94ec81b2fdbaff45e6e0769c095084458517844dab. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UK6821729171.