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 0x22cca46e3b48706aa8c03f5636a6b33e579be75275419da50b8976d3c7f2fb1f. 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/d2f8a449-5108-46f7-90f1-651c29254850.json and https://artists.proofprofile.net/proofs/artist/d2f8a449-5108-46f7-90f1-651c29254850.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 0x661711f00cbc2612d10fa667f43bb154873ae084d98c8ffb47c007a05f90df27. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PLS922252380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48a1a11280b3fb3b3cb68b1e0d9cd851ba86d69abc46968f076a55a2144ba68. 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/PLS922252381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff18ed8f7bbbd20a8ba41a8c5cea688b4ce2f26d03a742d6c24d635e7c49c096. 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/PLS922252382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2456bc0eef9ee4fa0f920571cf5ac2796753e7024f952fbf68e0ba34edc728. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/PLS922252383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e7085585cc6f7ac794d995fa80c861b267b99a939047e40dd4725dde324101. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/PLS922252384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c254a9b6084cb5e661cc05cb0e9269f4209afb2452e13269a3cd3dc065846cd. 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/PLS922252385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65288db0a97e0d58ccf900185a34898c54cfd71dec8534b6f279f454a6d17245. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/PLS922252386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740ceee85754dc3d311e4cc65309269b46bc471c7fd85f901b63cac368ad3b94. 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/PLS922252387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08eba3eacf3624adf8d58d9518f73837be6eae6b51d87b6460998466a9b0ef9d. 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/PLS922252388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02727dfc65c284cfc8ba8a4de9585e4f6ea5d9b7bc16a327b5b754c8cac2762. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/PLS922252389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f4747122172fdddd54f1be141604234af5f7fd4344d811f89b2163275deefe. 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/PLS922252390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff168162cb58a34e006da497181123ac3ac266591043c013b05e0d31cf76ff4f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/PLS922252391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217b8938b2a375f469de9dcf67405c0dad6e1d1fd299c6f05c734f7d7c4fec9a. 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/PLS922252392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f28e38d16d48e2673f25ca4f2b6f96a56339198c07f04e1d07cd97612727d5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/PLS922252393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b9b09a4b235688e8273366642c8266b75f9d6ab8e445daaec35d8361306d89. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/PLS922252394.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ea80fe68e59780ec0036823385168dcfa4be8232edf6ddaf0cf75aea1cd3e6. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/IEWWH2421573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66ee972e623b50d20f031673068583fa436454dab808b134e5ce2bfb707bb33. 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/IEWWH2421576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1c2ebbd27ddf6b050797d55914f1040208fa8ee959b5afb05a66be3988fb2c. 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/IEWWH2421579.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893cd1cb8d45ad4945225783a727a3fb3da61bdf4af3fd2a42ea9aaa2fea67b8. 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/IEWWH2423981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c770dfed23328f7756289edecf80645785d1131fd1dd0d07498de443498b98. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/IEWWH2423982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8bf4ec7d933f8c612fa0744aee8630b85fdc0f0fffff0d76f8b330d9a27f78. 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/IEWWH2423983.