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 0x9d9a51642db8eb59faeb6bd627ee3dcd82fb1083e5f1ecee28e3901236d98377. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a82c5bf8-4bdf-4d4f-9c0b-5caf272e067d.json and https://artists.proofprofile.net/proofs/artist/a82c5bf8-4bdf-4d4f-9c0b-5caf272e067d.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 0x6d8c6e0e846f09532a5bb7b4dabdbe8c1f230306468639c02d0663a6f4cdcbd3. 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/QZNWS2174304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c322729afedc2dd70cfc6fa888b8241b219f5a534e0ef44abe20a4ee88910a8. 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/QZHNB2066825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9461adebfadf715b8d76cb615217da60737c4d6da16c1d57b6b08effc063dfd6. 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/QZNWS2174305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8e08e9dfc5365efb87af039dd21029df9b3b6fda55955c0cc86fe8805ca4f5. 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/QZNWS2174306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd900a880dac10dea2c7610000fd6a269783adc4a469aaa06405c9eb2b67cb21. 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/QZNWS2144413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7cc9df97ce560db28193fc1297976834c60a748927ebc213e3047df33dcdda. 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/QZFYY2143772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6455b327614baff17b49f4648f709d8648d18fc5c28d9d26ac997838319e748. 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/QZNWS2141576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf74e1f0d095aae113e2bcf3838425b273c01930223be6ceaae3b61c26c1fdae. 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/QZNWS2174307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf41409f945188975fb50dffb069a4aaacb3a5e0092e99d7d75deebeaa0a7a90. 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/QZNWS2174308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66e736c43c8d1298d7bef2c4e058970dc092b6ccc86ed63defd6200468c9f3e. 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/QZNWS2174309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7420d80352ff432ccb8e6597161527e123ad517997188da1baff16b87ef3c7c9. 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/QZNWS2174310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2db8c342d63853c123165a2a65a642681b630d0639b3a0ed1d52c0c11ba06a. 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/USCGH1932379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75709b277230d5baabdd421e1106b39fc616d5253c52c9f9ee39ef51dec060ac. 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/USCGH1932380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2792f9983322ab11dc946941bbf17b40306d9c1b39723b2eec897d3958789926. 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/USCGH1932382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4429992b3f9f77b466a054455e2e3fbde629ed0ae7c930c6ea9f57b2243a5aee. 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/USCGH1932386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7099630d0ddf14209e5daa2a2a88ab9895f7122caf529375b8a562af4286ff2e. 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/QZHNB2356707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd900a880dac10dea2c7610000fd6a269783adc4a469aaa06405c9eb2b67cb21. 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/QZNWS2144413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6455b327614baff17b49f4648f709d8648d18fc5c28d9d26ac997838319e748. 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/QZNWS2141576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca1b6305c7867348c69ebbf38df680656b0040263cc14c50423970b8764e5e9. 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/QZDA72151024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7cc9df97ce560db28193fc1297976834c60a748927ebc213e3047df33dcdda. 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/QZFYY2143772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c322729afedc2dd70cfc6fa888b8241b219f5a534e0ef44abe20a4ee88910a8. 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/QZHNB2066825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcddbe08510fadebbbcd5b5f1fd83a5477ea5dc8804b3cec92e90da1174c88f1. 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/USCGJ1855582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f2573338f96f3206d68ab7291bd0fde5d7dd3738541fa888ac41de6d54ac32. 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/USHM21758204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833b45154126b5f8af9bde845251b342e14dd3ae6ac9986b18b54846d7d8939e. 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/USHM21758205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db853b77421dac0837639aee0e3b9265db1840be02f9e8378ebb479e8c3307d. 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/USHM21758207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe240168a2b9878be7e1ad869c642b889fc37ec3f99476079a5c946151e8a83e1. 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/USCGJ1784210.