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 0x229bb5b2d91487d4fc1a714af62c5f06a959bb9bf7732f72022a054dbc777c3f. 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/b50438a4-e672-4eac-bda3-2ff5d5c78a55.json and https://artists.proofprofile.net/proofs/artist/b50438a4-e672-4eac-bda3-2ff5d5c78a55.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 0x29d09a069ce14f0a22f87ae612efd5723a5e005511a17eb8568a6a00a5f09e1f. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QZFZ62243590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351c690a53bdd28b605acd95cdd3d4c483def5bb026ef41f47b677a9c243d346. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZFZ62243593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc101769f514f0af5dc026dd30a6fc07d5288aa382410c5f935d8a1af7a234dd3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ62243594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd6a81d56cbec18c059522d176cd806ccd29f2ebc7e4b3a91f78ab259be8928. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWS2225471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e800fff935bb49672a148ba426606dce870622b9c88e8a56d1d834f9b9892ca. 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/QZPJ32227734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca1e8dca4ada8b112e6744eb5c0ad7276243e2cc0582e55dd83b0fe8dbc5069. 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/QZPJ32227735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0b524e8aa36a6e54385fef3dfa15f59e5d6c195fbe997c08418e79744464da. 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/QZPJ32227736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8264075e79acbaf5d109b75771320e1ab01f8beffc29076bf8d6ca90b9efa441. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZNWX2355778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd67c5f2bbd91531e133d01328821220af836e9813ccb08302dec25e0a425f45. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZRP52307136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d0022120f4babf4a68f9b1ddcd095c5e66dff8c82db6a59d9ac5353b32b1e0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAX2335382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b742a13a0b3656969476022276fe3ff1de3730efde073e7f8853bafc1b6ce21. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:58:27Z), 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/QZWFP2435541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19198e75c4af7040afdeaec1c6687065e59849d7c24cdbab11ee725c9fdafc6a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZYD92404989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ab37cfb9af868d343bd7b33d89577c30b6aae58ea65800816be18df8de6850. 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/QZYD92404985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf70fb92314a7625ee2686b40d45a710576062d4f51e5386e20b63d11a78986. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZYD92404986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ad8237e69e118de9adc887e0c0ce6afec5579e5b19034a1111702eb6b5a9dc. 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/QZZ7W2481995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8364e4f8a13eb5598b521335c54633e201b928fd676326a31b5930a22de3297f. 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/QZZ7W2481996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5b8814898805daeb0b25ceeb6eba7e4098d60b084c7ef78327d64fcd1d56be. 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/QZZ7W2481997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4942b30aa8956a477399878c13be8ce9428ac5189357526ca1b8cc5c3ce98914. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:26:07Z), 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/QZZ762482446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9903eff547dda63cd65c0e2b30d4b44280a2552aeeb70178b98230e9c1f36336. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZZ7W2482000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aba89b71aaa28cf5372eee6efd6cd067435bdf4086bb49e9352c88293ba463. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZZ7W2482009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1696179084c4adcfabb8a6545d5c8aade5d5adec97196182f3b2a21ce18601. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7W2482010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d74b22feaa140f55da47b5fe0cb73edf433dbffa5cc51d307b93b8ae211e18. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CAQOI2526937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214f7c60b88ace619918e3e6246a70ea093dd0f2d356d63b635d465829a50129. 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/CAQOI2526938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f254e80b447c18289ce98fde0866ff0654226a5dea9dce1af0f864588c6ddea. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:33:18Z), 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/CAQOI2526939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec7c61ce2372fa163b958a184dbecaf7dd489a1e6060d2807b8069c95c481b6. 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/CAQOI2526940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a7ca9e0d63481e305f45204007359264d482428f7ac2148dfa1e8e520ca3e1. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:35Z), 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/QZYD92500681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707174e5edf5195e3de6297447c6bb80de202cb896c525173fe20664bbbbced2. 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/QZYD92500678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8bc679f73906cbde2342f3395f80830c4cb5e550f87bdced194b575012e4bb. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:28:09Z), 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/QZYD92500676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb078e3d4a8420bc2463251c74f7e76899e6b65dfeb329488f4f5f419bd8dfddb. 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/QZES92240750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8d3cdfce258b84a2aacf31622d107991d72847e85ba3603c4184483b90fb9a. 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/QZES92240755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c3bbb2f133543aafb1383068d624b3df3160dbe06343603d155675d9165e29. 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/QZK6Q2369763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f33133dcd404cd33b0bffc4f42b99f1e3e4b3ffcaf029a1696dec8f70aec11. 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/QZTAU2277617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd519159f5a160156f5c93d364670216938b8671380ff9bc9df0734c3426a1771. 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/QZWFF2432307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b52f86c8553d750e7724b0c256f7299cd1f57171d882952b6a7ae764407ebba. 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/QZRP52261535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc158c6bd50f161856c870993198ab5a4600d59a034fa18d77062f85a015035d4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNWS2200129.
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 0xa2728c2b759784f171b4d544a5b0ecd7843fa03ad0fedf18f32134eeb3d37390. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZK6Q2369760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb648a58e0727b003d0f0c61ab7d85efe858aed184dc296f715ad2ed1b1272e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZTAU2277613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2baa072efce61e8d2dc1eda678c0614f94cb9d466bc8d4ec63b6deaf2cdd3b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNWS2200131.