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 0x72a41ea91a0479ee108f45157d4a8929bf5f0ae48b69e03f202d148f8fad630f. 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/3b7e9fab-c777-40b5-a8f5-2e87ca360f73.json and https://artists.proofprofile.net/proofs/artist/3b7e9fab-c777-40b5-a8f5-2e87ca360f73.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 0x231cd321d1df15dbb4f66c71e7b053980dbd2f29758c81d86db8682559147db6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYY1990307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeae94ded29e937738b837078121741b9dc10d9bc8609065e1bab712b76149de. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:20Z), 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/QZFZ61991322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7007d4a5d105acbb7abd5fb9ba9c2a12b1924f25f16071abde3ae173cdee2782. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZHN61910043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9942d27deb95cca3e909a469bcfebc42b447c3961f79d04109371e50acf1c9. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZFZ22079424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd7e06ac11dd9d633ca844477ca9d1ee7d807c4a6cec8ea44b0fdc839e1457d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ72074409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76f11bbe15b0228247ce9565f1990d94d89581791bbd8e6a35cacdd08b56695. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHN62030429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89a8e1425c92dd4927f1e4de963e828e1c3671f0f7d9e7109d112f9e1b2c883. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN72013371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76748442927a18970b0928d1d54dd2ece0a9904a045894dacab22ee929c041d9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHN82007523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a3c0e8b3e1a14e5b4ef86622cae672e93ecf71b9f72f32b729d933f01a7f09. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZK6M2199028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c81af413f3c8adb3b3111a523a7aa6374d90e6e6dc27ab26ba4440795f1f955. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZK6J2198462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf444357b7f48746403b882e2320ca7c159976c776e106ae23f1a960beee0f5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6J2198464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa005970936315bb48ba0394cbf26330d3fdf0d0124dc5ea9a6af0e54b041b9df. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEM2191108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaef826bb22611ae1c5f0e9f4cee8dac7001b68e962f16e58929ac03fad6451. 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/QZNWX2145670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b57a3c96a5ef59f59f1db24bdbfd78057806e86b421ab6e353a51f8c5dcedcf. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZES52220813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3698d38749d8e3575a531817b44484781bbeeb6903a401dc26dd5ddd247fbd23. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZES82219692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1d1f5ce51c291e337f25d480013d955b8c77a21eedc28c3421031cfe00fe41. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZK6M2279329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c96e65b12141e1c16dd3619a8bd733b4c47b7c71cb8c5e591b5d66f527a7eb8. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QZDA72338632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7492f6829633ef2eb20ee0cc9a2c34e0d46e1fa4328932e991ff6c51e752b56b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHNC2384192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fedf715a87e1b4bc81d48e0ceb41416473363c9a909e1435ca92d5e13ca41d2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SE5752424952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf4e28a583ea2a048b22cf7c7ceee968c5bd6087afad9bfe92d1f3e241458e4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE6QE2448330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3512d9bf4ccbd12c138b4c7a55c13b53b7b33e1933d98e1f30bb08c4b7073e3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:00:35Z), 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/SE6SA2468379.