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 0x86f975661f57a07e0f786d91d657a6674af08c230455fbbb109647573ff0c8fa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95fba657-5eee-43f0-a30e-a40d94d0dfc7.json and https://artists.proofprofile.net/proofs/artist/95fba657-5eee-43f0-a30e-a40d94d0dfc7.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 0x8cd0a8dfa3278c330305f46322313adf6479ace6a71542e6e132d45c641f4628. 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/QZDA42435543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7b5ad107b5e9c36540b0c0f6cec08abee49bf0585f9679ee794379a24433b7. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/QZDA42435493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fda0b4c3b866084833922c63a275289b3f58c322700ca351b849799e6524440. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA42435485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3ba61c69e35ae50d52dd9fa723fb4558b4c1d7b81aa4cdd88eeb4f1f0a4561. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZDA42435412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1726806af7e603891c3d88d91ba8350566ca61031e19ceb0a13c3c06686be242. 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/QZDA42434996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f1a699c17588a1fe3cef59b04c06e8037abedf58d7c10c2acceb5f4597950d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZK6L2325173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f1a699c17588a1fe3cef59b04c06e8037abedf58d7c10c2acceb5f4597950d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:49:29Z), 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/QZK6L2325173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbca9677de8642f90dd26a69a9c10e05a746e2f5d7f1f02583d8742ff95e9952. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAU2314808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6901b10a2620e33a92896187e6b267491787ba5410762f70760310081afab79e. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZDA42434844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eec7d30952fd81c5702655c515a4f12f0f8857d79a73459fe7f6ffc1979988. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA42435091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27e88ad1f128106d06884a8931d04688a0867b0b395531c776b9a2d8676c4c1. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/QZTBC2306937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1689b4737e52524ca12cf057e909082e08a280b5520c723bcb93be12450adda. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:49:02Z), 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/DEPI82511828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93552bd13a500af798f98297f2288680bb6a5f4e876a19cc28f0d1fd233ddc4c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEPI82511827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddbaacf3a0d2d07da08121bc1003e5761be8d623ce1af09e9da886888d96417. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEPI82511401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fb4f37ef34e6b4a1f227d16a5c19ec44e4e33ceea356ada85943835122da70. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFYZ2465883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15ae20fc8b524546073f147850527a7fc1277ccd7ad8430adbff2e3e809a3ad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEPI82452718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135e16ff6809c477fd8a61884a3f57c9df2eaef16d2631ac950e426d822180a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWY2486381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5651daf45bb10a506b876c660518a24045fe9016ee7f2a534dd60de3cc3a154c. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/DEPI82511446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847eb5a488765c0b255c112f4c82dbefa25687ed9936f5b11a6dbfafcde93396. 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/DEPI82439483.