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 0x9d63a49c0dbe5ae43382f349da885af1dd0a6969980fe3be5528b40cc4bb6944. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef31e595-4d45-423c-8a50-4d374f293652.json and https://artists.proofprofile.net/proofs/artist/ef31e595-4d45-423c-8a50-4d374f293652.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 0xe82fcddeea3ac445e630ebea2deb53dbf3f0a5cb783fcc6bc96ae31bf634cd60. 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/TCAEB1981143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266e421fcbf9c3eb41299cd57ea9c2fc3fc43a96d1f5a37ba44e8cd447edf841. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAEB1981148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57176c9da488f80e647423aba9a6c4ff6ec9192bc011aa62f8bc9c2d789cdb2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAEB1981155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd19e9a357734bfad0ed65f63b12f8144a705bf8ed1c49bca9587ab5c25e9f1. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAEC1950978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ed59c0f3a233887b1ae03561564bb424ff0f6d6e4d36623aac61746d22ba25. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAEM1954081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd187808f49fc73b1eedaa87e42a432adaa06133845142f54ebec509249262d0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFH2014043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa921e265c88890a38f1a047ef795a67ec5d6fda3936f3b9db5f39cec276d0511. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAFN2139720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d0736b2c38af1a5aa0ec4754048063237e1595c022466b3b0c7fe9033d5132. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAFY2191459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae44b7c7463e0348cc9ce59f429d46a623f79e84aa85130e7fc46a92c5b2000. 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/TCAGD2254747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b84b3a7230f0941d3da562fd148faa6eea851186722f8273830eb5ef1f15f03. 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/TCAGJ2232404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb11a90ea472d04bc33ccc67b0176111bed89fd806a6c8d9397fec76b7a0e650. 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/TCAGD2266180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb498b59a564b8e5c4d4bf21069ba78b5653cd197d3b0ab3fd1e5b5feb8dfabb8. 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/USJ3V2377109.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d967201a1b7410ec864aa6c7e760c72d30dd29f5aef6b82fb520c24d50d4b2f. 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/USJ3V2101622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28108fb68b080f837b422bd17c580fae3c3d1e5d325b7180f2f8fe6a9da534f9. 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/TCAGR2282872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1243ade8c193d8fc3f9904e595bed6c41a1a1ea612070a3db56bc453e84348e5. 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/TCAHI2355977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7936545b4c47bade41aa9c7988c471400c837c18c5d23a08fc0736c08f1a82da. 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/TCAGN2211220.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0dc51fd9754674f6b99562d759d571da1e0edbc7fb39138f9f416643e3e008. 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/TCAGJ2297125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02c73ddace1fe16b764c5d5b8960c9e9ec4211ac788ee9244dfcdcbd5a08c4f. 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/TCAGG2249325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1727951815659a45bec7db59787089cbc3be732069622f9b9c0ba5e02a36e71b. 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/TCAFX2152603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f6b895c54766ce5e4eee2651c4a7bcb779e0f508397ba12e02c41ee19d101a. 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/TCAFQ2124309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9bddf0a340f9502383ebdaf036cc5485ad9deeb2834d1454ab640400779893. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFM2197716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca8bc85197983c532371f016b72d7f19df912b9b42162325d67175c64e1ad92. 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/TCAFI2034761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83c991d2c50e8fd185da04a5380199e02bd06a57ad3fdfe902bc308a8453333. 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/TCAFF2016730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56caf2e050cbc21f60dc2034fb8271291baa0e63c2eb7d432c6108b4766cc431. 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/TCAFB2006390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a4d0e0de1462094d18c685f43221fd0230607f7bef0dd4250ce3140b595bf7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEZ2090074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa33d076b61bfb2442cb02186a20d4ab82aa4cb41898ea8d38c9c39265811b4. 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/TCAEM1954500.