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 0x2884bdbd4c2ec0ce90eb7fd071e57f30cca860acabef56f9498f354c18558cea. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b19d5c5c-682f-4173-b853-179e4eb945cb.json and https://artists.proofprofile.net/proofs/artist/b19d5c5c-682f-4173-b853-179e4eb945cb.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 0x6b79388e990efb8c4cd3d7685e30795663b7d1f36aa4f10952cb09e98b518058. 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/FRX201605603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922e34cc5e2b19632a8a1158cbb1a8435a092bbc2033da04db80410989453563. 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/FRX201605604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4770da8b78cb903c2730737703654fa82d1f2c34b1a01f31559e8cb6420d9f5. 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/QZW9K2381004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbee04dfcab08b3a5baffb1120740a9274cd42e2bc0b1befdefa92c5d17d76f. 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/QZW9L2375821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e7429de5286dbe8eb40aeda25f30c425788cd51286873f1669ee062f3eb9a1. 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/QZNJZ2449331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a497b5ff7c60da705808a1cffcf73cc1ba2b53e28d17167bcdf11255ca9c516. 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/QZNJV2430862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a673637d95c3eef7704b3c0630071e999232d5cdab9e15e63b5af4361c73ba. 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/QZNJW2363459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba5448de1e58c4ba9a382743a21de0548afa78865500eddad0d7c2aeaa93111. 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/QZNJY2214056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e33854b7f130e1c19075b5202a36b927c81868486ec1b82a07cbc0dcca2c6a. 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/QZHZ52229393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4175ca203936f5447a46e59d8ef4aa40bc4bdae31672763ebf3decd586d2893. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWW2127124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6f4919a117d19f19790969823c44b2bc6d3ea142b0c5a50c8a79bc53ed576e. 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/QZDA52192028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679c57dac07f4b854a75c4b12b9b164e94ae8ce8d74e2b805e72f033c593e4a1. 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/QZNWR2099244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee4f6cd5bf2eb3c94aec9a942810fd7f077e29b1b50da20becb12e2ef06a5d4. 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/QZK6N2000703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf812d671b43407e2597d7cfdeca3aaf04da03e4e7be8a01e3cd6290b94879c83. 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/QZHNC1997467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf003e836c421edeb5dc17be01e6383671eb9fa36a6f149d3f5373be5031c185. 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/QZHN51946951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf6ff27ea64d6b667415aa0fbfcd242e30259c75cc9f1ace12a9b97b2fe4b55. 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/TCAEI1940228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a99f200f8d4ef4b0f33ad84f7d4f43f22d6c94562bbf0a8859a1f73245965b2. 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/QZFYZ1949143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e6098a8dcd20fb3c3c2998de9990cd6b5d3c03fb427a7ad0cd67b1208919d1. 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/TCADX1845566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922e34cc5e2b19632a8a1158cbb1a8435a092bbc2033da04db80410989453563. 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/FRX201605604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e8ea81bdafed1d689936106e396d5f6ba7d9da6d403bee4801b34892bd3cfa. 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/QMDA62142972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c113d3e07a1ec8ba9804ba0fa0c755a2f183e19bb4740710377609214c6fdc. 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/GBKQU2260953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0e71c212ace79a1c6db86dfaa74626e2b25b0f82aff4836592f4533b2a8670. 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/TCADT1833343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e6793aca732b23751daff5b3f496e8957ca4bc2b796e3742e1cb378129f640. 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/FRPES2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452f2d0cc546a4d966c2bde9faafb93365f78673aff454e6c55991928e1eb64a. 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/FRPES1900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32af8681c04b6748ae8cba3213013d20a44214903df08fc61526f9f62301adf. 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/FRPES1900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30469a0d2923aad68603a665a3ef2bd56c011eb4c551b77017b3f73bd8e9165c. 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/FRPES1900040.