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 0xb3f5391dd1f53e68ac356587bc5ed5b276b1d18f6bac8b39ea7752c49d7d0cc0. 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/6fa05aed-8b99-46ca-810b-40c9929ec064.json and https://artists.proofprofile.net/proofs/artist/6fa05aed-8b99-46ca-810b-40c9929ec064.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 0x0e89d3cfb5e59e44b1fc318edd46c8774490528d52b14b927d4cb3442803f070. 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/NO2DY2300744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13ecd814cd6a541941b22edceb08fea4e571b06616cb77bb4457ae965be4a1d. 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/TCAIE2491870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a5e57f86d0396b0cd33656ea2bca1f264650e896f027c426066ae9da945e71. 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/NO2DY2400462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9a80664ce85d7754c5bc8eb851953c88ff57664e26a9441dd1088fe64c7dc3. 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/NO2DY2400457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bef9dba3d5929a2d796b9e6cc7f9321e852261bcca33f0499f1b33a4b37dcb. 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/NO2DY2400443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58857af701e54ea37d6d18ba6976dca008f7f0bd7d66c21a976db92c8da8cba3. 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/NOX8G2400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1836b191bed2008e8dcb6443d93d5b0baeddfe61eae69a1830c99c980c4913ae. 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/NOX8G2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638a157ebec87b8532c26f4cfd603dc9ab7ce82618d8b3a3617ad90e645ffe71. 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/NO2DY2400259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba7a070ae25311d6328f28d67fcd1b39b002221bae113fa345303af6c1f8efc. 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/NO2DY2400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe66f62cb3579b2aa64cec2e93b4a1908f49bc788a80504f8e3ebbc8bca1d0ef. 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/NO2DY2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9190b434ca782af5fcce73c3d1d50acb3fb17d34491cd733c8a85679de8abb. 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/NOX8G2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf547175b9d7cc177b3e7558197aead9e4b2d60639d88a335dd0e36f8c503f5ed. 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/NOX8G2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daa90b60752b2c535c68589e5b69dfacf7fa97ba73cf49050d153c204d3ed2e. 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/NOX8G2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb6b095a1e4aabeb36471b36ddd61222ad76060874906d32e64cf7d618fe69f. 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/TCAHX2406245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d707ce88728c32c2f8c54a7fb26d937f887a686a6212bf829be73f193f92386. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFR2366675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7900f6d9c57617dffbc46b201eafeead49315aacdd050b12378f596604500ae. 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/QZWFM2399032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d321b2505aa42650f173b18540d89a2e76edd26d837c6f1645207b2b817120. 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/NOX8G2301700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dfbbf0c4b29603d60ce70ada887e9f231babc65a519acf81177f0d15b81f7f. 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/QZWFE2347342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcc4c391184f9f96794e45845c928dcc5bfc6b677e1421871c32e3e3ab4c236. 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/NOX8G2301610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a5322c4ad664ae840263b35003cc4445689f00a33251b9f72b403a250090b8. 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/NOX8G2301620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5591497e838a7c45c32a6aa2e0aca922733c80a5fb0335f36078f439fb0370. 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/NO2DY2300642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15be5bcc622d5d64871f2f8dcc1c8e3d782c1b6b21e2059b4f53b1f14f2796e6. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/NO2DY2300640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc81f734ab2ff58907c11b1abd0f335493b277b4dc937a53cc86051b469d8919. 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/NOX8G2301540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68609006184dc5b19c377a9c0a7e9eab2ce2823dbef9c6a5808e86f07256ee24. 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/NOX8G2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c193191176590850900d3c5f029e0a21a54d600b694ca50126b0e07e4b83421. 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/QZTBC2423903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc6e12c1e03a2de585c756db1c753f1485ce9c2189ac353b3a9f164f854a1c6. 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/NOX8G2400292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495e117bc65acd8587f5d1cf39e941aff22939b8a310bb30f8ab9d5a30e1384a. 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/NOX8G2400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da22e7e320e92ecf60b8495f7060e0e853d28dbe216be6bd5f2824ac1d29400. 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/NOX8G2400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074de2a8753b6196a898f97d360fcc29ceed4f069b49ad34079b121cc6018e9d. 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/NO2DY2400537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc598c50738ba007429e64c34e38d5576f80b8ee3a31e922b35d4aae4825fb23d. 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/NOX8G2400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb998fcd417390df9581ef337a2519db14afd411fdf701bc1deb049cd608961f. 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/USA2P2467160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0e33201637bf7747f235c95385d71f476791a710df6c6cc18ae4b9073ddff0. 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/QZTAW2366346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f381862f2f6185a1ea97f1750f222e74a18bde1dedb39b63fce120b09fed0e. 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/QZTB32355613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcae3a6c1cda50fc0bf8ac694c389f948a0951bd7d1a345b2f3f1dc7ee4f37f. 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/NOX8G2302013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1077cd5a47a9943d5f63960e0e2e7d21fc21d73fd361319243278df37e000853. 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/NO2DY2300690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34ba927fcd5dd8c00584919900180d81813c969e112509aee85c33370ae2e36. 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/QZK6F2336428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214f3515a38344358410d5f6c9c429ea1b157d6d1c6750774b4220b0c6b60977. 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/QZHN62369988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1572a7a0e739d297476caf94e74a338863ddb9e4a138847f2dbc7358dfb617. 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/QZFZ42322508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6828f13b90bc4ca649192a845b389a2507d1971c43bbb9c5f421e2ffdc968acf. 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/QZHN62213865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2482635d9228a836fa653fffced9f3c2d11cb34a6d0a7f2896857c20ab9cadc3. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZHN52313687.
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 0x1909a8ac0eb80f50b3e8c792bae84f1ccbd129e2eec1308695a0dd225198b017. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NO2DY2300257.