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 0xd90666526662488586e078e2cb12b083e1ed039db11b8a1f83d4d10419d90a4d. 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/55f6694c-e63d-4497-9ad1-b67f98d977c7.json and https://artists.proofprofile.net/proofs/artist/55f6694c-e63d-4497-9ad1-b67f98d977c7.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 0x3b827ba98a9b54c4c2981a275c43245f6273a2f70ad5840a2d154e0eeac839de. 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/USDXS2303435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c63ca53eb0a40e7456338d634d17791a9795dfca3715a5d34eec2b6a5e36094. 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/QZDQH2378310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b307fd08609bb14999ddbba4601845988cfa579a048aab63e3f8ee9fec20203. 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/QZDQH2378316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef642784d32abe9134357d3a9dcfe1fe6bbc373ab42a5d5e88438ed94241b215. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDQH2378308.
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 0x186230cb2e6297c4d17221884eb64b82c0badd39987a033e98a25c8757240377. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZDQH2378314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1444a2829e9831718333434ebd5edb322d0aa9375f379af58385ee4c4d69dd68. 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/QZDQH2378317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff714103e35c4c874349e8e4b5ae520492b1b6a016ca9d9cf79ccf391294862. 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/QZDQH2393756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c9d863589ec60c8f80c5cca057efbc1621449bc614613a5e98b3d455a71804. 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/QZDQH2390982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c9600c0b5e7869b817403a1c948e793ffaaf4e5d662abb05e402568b742764. 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/QZDQH2434335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653e37bc11393921f2a71492debdecff088f27f4b17e872020ad8a98a9e05e1d. 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/QZDQH2434336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c354d045cb153a5d4e36a9de5c3c4529439f6f6427a65e9f7014e2ff477a01. 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/QZDQH2434338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00663f44e35b577f3fab31e13653f6da654bf11ac9d65b8e39cd9171dcf2ff5f. 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/QZDQH2434339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b077b1e68ba4954a0ccce8c5cbd7ea04709d2d3dae6258777511b9abc62bef. 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/QZDQH2434345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5e4dba66dd044444fa7d9cfd9621dd53765e887f930454eb695296af01c951. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZDQH2434337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ea36793ad33ee4b0bf49e956612029a43a7193ed297573a08a8ebd8d3663a8. 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/QZDQH2434340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c4715a4db5146c6d335554e4a7fb41fecb475439db07413b84cf7947dee3b6. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZDQH2434341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978e60a99d90f650f0181aab47d6b1753f783a3437efd60928fab6a3226567ee. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZDQH2434342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126060671acf9afc838f9991019b1bc5e56d09c3536de1c9c4e790e77ccba880. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZDQH2434343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6c2e2055ba98b0df0b88dd8e9aedff097afe48847daf9cd7581848d03561c6. 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/QZDQH2434344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f164bdcb562e588c44c989084b8223d9d389503cf4dbb69eafb7a5fc929c89. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:23:17Z), 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/QZDQH2394311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74291fbe9fc73d9abf082d37982bf05d20d03b72476cc6eb8424c7341ad88931. 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/QZDQH2394314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106862a1ca6e5e8133f675dad98a1da547d54f55183dada3e7c4714fd922dc78. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZDQH2394310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb6ccb9c54f4bc676bc0e48c9fa1c9c77227ac8963b3810c561b48a27edafcb. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZDQH2394315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe320e981040641b6d9ce46f2688f42f9a92b3f461d7685bce0a8b02ef612b752. 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/QZDQH2501109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4199f3aba94f9ae337f7bdb2942d6f78102df80896f24c0f71a7eab029930553. 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/QZDQH2444771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea404245830ffa3511fec9de08e0d5952b6c2f52b343375a7b262b34930bcf0. 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/QZDQH2441219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fab3823637b0ac0fe74a51fbe42c1ff5fe5363d18f081d1b8d3a8b5fba7b677. 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/QZDQH2438289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd6603685c4e4fd56378e4159b40b6c9f8f7b26f8026dcaaf7f0dad2701b23e. 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/QZDQH2438283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584f4b41e20045bc44f748eaf82b0a7413309c4f1a9a9aba3c2bcaf62ee12020. 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/QZDQH2416323.