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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4191113e542a674a2743457faf7405c57a16873d198e73630fd4379a90afdac9. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c23fb118-0ba8-4677-8fbf-139adf573119.json and https://artists.proofprofile.net/proofs/artist/c23fb118-0ba8-4677-8fbf-139adf573119.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362082615a64d11ed4d5db864ecfd552e4425ed200e24fead1b68facf2261d76. 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/SE2VC1900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd640ba2fb9144ed4c51119b592190c894f8bb047402836e84ec49b801984f8ca. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE2VC1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc9fc10dae23e0b0cea6f8a9408fb83523637da15e25b279e9914922d6e0ce6. 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/SE2VC1900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2445882f05b9aeab18e25d373268aaf0476ae2bf76ec08fbcc75b832fcab4ee3. 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/SE2VC1900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa568a95dcba46c099e06461dca57919b1b6cc5f04e0642db320cfb3d8e4ab882. 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/SE2VC1900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c71af9c42169617fd7e489f2a7ec40a42e172bffd2b5ce73011eb3c4b6d364. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE2VC1900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ca6ea13ca35d74491ea1bfbea3a1d72c45db520a5ab9b8f758c1e61e8d840e. 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/SE2VC1900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70086eb7a4a70111b1ca18516e9d796c69328a50431b25a971a4908d922fceb. 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/SE2VC1900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0517f07b292423813804230f69c5ffd44e43a59ed6524bba507f9457448d9b3a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE2VC1900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a36268c4649a55a1032edcca6db826fcbb51239d3f5d4063d3a697d926e4f0f. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/SE2VC1900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4975494d67e99c2ec1f8dc954cff90c9aed3383a4afb528fdc4c44df5ba60b. 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/SE2VC1900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7681b69bbc521e38402ef46550c8aa3074ac71af66fb104916425bddd4faacbe. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T16:59:25Z), 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/SE2VC1900119.
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 0x3acf12745590a73aa79f9dc8cad9976da9de17f0b185186f516f5fce92b1fceb. 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/SE2VC1800501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8036feb62f560d9b17424555151519561cd8b4390494b038ced4b49029bad58. 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/SE2VC1800505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dc336a6dc0e289b1d729bb5c1f54936498f3a23d6ae9f3c04b13cbd24b96c4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE2VC1800506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec07ec0d1cca89887b6a4341abbc67f40e748311b9106946fad3f05d9951ee44. 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/SE2VC1800507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1c4ddeceec3f0232512d2527fbf5c58ee547943d799f2a403df2cce6ae46e5. 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/SE2VC1800510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3537f255a77e5544c3a347255b82f7711a014a6e671553d56705896ff0d953. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE2VC1800503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a28e018862860a06acc98c18a31c59a3db8e1239fb3adc94fa620f65cebd801. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SE2VC1800520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abd767783ba3996fdd4284efb1f5072033483610329ac679933891df2743bce. 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/SELFA9505030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49699d2e894779da4aa418945e237024fc3e0f1581ba4c0697f8952e4b150720. 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/SELFA9505060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f35a720623ea28f2d2b70c1ed208d877278dbde1bd63528357f5e2a9117e6f9. 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/SELFA9505080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bb4b879246a753a6c23ceddf4dacf45d58a1d549327a70575f3e6214c2819b. 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/SELFA9505010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26625353c7e3dfb3b862ae33b1d7585d5ad4bfe46d4ab154648942f418e08c9. 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/SELFA9505020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e44dce970be6157190e98787d720b569eefe2cfaed4a1765afa9571ae7dba5. 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/SELFA9505040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713f14b38d2a81e7699827b97458de6bd4d9c0bd18f0ed099de55350382683b1. 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/SELFA9505070.