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 0xf5d143c9c9b788a2c9d76b3ef39194d739faf10ec015d536e2cbcc7d2351fb1e. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ece395f-ff00-4562-9ac4-931f36f43e2c.json and https://artists.proofprofile.net/proofs/artist/3ece395f-ff00-4562-9ac4-931f36f43e2c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x343abe68b9539c2663f991eef4e79809d09419edc34b228a96f5a44094219020. 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/TCAHC2371891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497c454e5e74e00cf2ca1a144c51d3097023f03b85420687832e6f9446df865a. 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/TCAHC2371898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b21780b9dab666be7249aebff1e5654690edd02f1eb1537f38427268e2fa54. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCAHC2371915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807a18f0904bb3a2f8c45d7ecff08c0a45d2e460f740505f614655daa47a758d. 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/TCAHC2371933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d027576288b8e146e5fe23b21363ea8dd8af21579d1120a79818e1509f05a6. 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/TCAHC2371935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58752450a6983cde225e9d6718c60ff47b96031023d6ea5586c34000b9f7bf58. 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/TCAHC2371951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6414ea9420788ac22ac97f9d047f4425c14d8787bba1d8fde37dc079553594. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/TCAHC2371959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653d7295033f3987d2f4ab0cc18e53ea0046e27e83fea4f7a93d08d5a533cfc9. 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/TCAEX2093208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ba2156abc3ac7942d6671583a298e716d7cacc7cbe1ce80320f11a7a0dab20. 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/TCAEX2093210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1677c4f6dcbebd9ef2167816749001872d1e6fbc79b495e72d96886a84c32d. 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/TCAEM1927693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67474d4833c57a139385c18038d03bfb56f8e8a6bd4b01ae47f9bb175c95db6c. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/TCAEM1927696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beb1cda50b9e4311e20ff6edb2a832681dcf4803a42f2aff4ebb21337a42298. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/TCAEM1927697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5a59841664fefb475f864c8244c6b9b69ac02ef392f5feb69bb6f5e3c3dd3e. 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/TCAEM1927700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b676aa230c791dea6ca71929ca75d0dd59bb7c40a7cfaa191e6dd6b96ce0669. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAEM1927634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696f214603e0d79873e4551e9b5d21f9a3512c5cab3e788309ea918a05f5a9dd. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/TCADC1746247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154acf6e83e7951047718bbd45b5119b24ca154158d8530b24d92ef1392eb1e9. 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/TCADC1746262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d43c8b125e5c546fcb9a7008f98d8b85fa15a4852663a62ce9137966be9f5fa. 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/TCADC1746284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065173870914568cdadbeda0617e65fee353cf48fda24aea14ba8c23180c7cc4. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TCADC1746291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34eb8cf7052bbdab3c42f6ab036177b75d35c61812ab294eb64ac571a0e6075. 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/TCADC1734342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd660a392a50e16e640b6ffba164521fbf005e970e8c0323cd9cc208ab75c351f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TCADC1734343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c587c6356b2a48072dbc5937b95ace08b6a74bbb6ac2a4eeee93cb29413f4eb. 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/TCADC1734348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cf0f20ef6d97791706b9e82a1f3c5b24da84b2541732ac0c8c944e7ab95cf5. 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/TCACI1506916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42be2d5c7da28e4f2e4181882574f23b3f17672cc58e3fb8a21d4ba87188e1dd. 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/TCAJG2547887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8603859a41d0032b551d090e7bdf91cad01bd45604251e9c26b95d167ca531a. 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/TCAIF2450119.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8897d78ef0ea69aa1cb5c8072bf224cffb20bac4f22c1271d1c586617bf88643. 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/TCAFH2043295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9728280b0c4ef06bf37b7e3689b52c257130c45d05ac9680c1898c248f136a38. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NL8RL2317420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ede860deaabf8820e72210a341c7c6403c6b3ce79c9e6df251f3209981c9535. 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/NL8RL2317421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e4813ce4bdf77621812569f81c51b96cb8d0973f9febcf796c221cab707b2e. 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/NL8RL2317422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd80107a1097f895ad2d7923f3987ccfb971363fe7dc0876e44df8b980219f32. 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/NL8RL2317423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871d5a80fa3d7688970b7b1fd9ef10ebe1502f5d4074429c07bb1acb8a2675ef. 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/NL8RL2317424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cbba0b28695ad733f03483d9b32268e22a3a3ca6590e77982859789e3e9b7a. 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/NL8RL2317425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8430a875e86c91c84cdd5ad6aa02c5b127b02bc30805ebbe5d3e2a95062754. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NL8RL2317426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066d8ca67ded9e00eb83c19dacb8c826d7779e8f8c5ccf41662e8e8b1cf34a55. 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/NL8RL2317427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761bfb59a3ee9050db4073d0cc0c93c4e53a9e3c75e8f2f45807c4e8e7a02fdc. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/NL8RL2317428.