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 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 0xc34fedc4c9cf38bd840349efce573954d1306484b5b40ba432da9a756168a620. 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/d55f7589-5da4-4ef5-b694-c94fe40ae930.json and https://artists.proofprofile.net/proofs/artist/d55f7589-5da4-4ef5-b694-c94fe40ae930.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 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 0xba79ef081f99c819a109c57f946a43a7b67af7b57cc3fd33251740e2b8b6eae2. 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/USA2P2330808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2c1014d53918ab147fd8363ea67eaeac05cb422d2bcacfce259575234cb3b6. 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/QM6MZ2407191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f67834fa47bcca89dea58564745587b247465cf55abaa64475bc3ffd1ba4076. 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/USA2P2319391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987f60bfb871621f3a0a3448d0f3eb1cface48640951036797e3fddd3a4fb431. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6H2194082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724efa36daf1c3e8f62896e1027732c56fe08d6553d37872411bc5ccf2470581. 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/ES64E2488716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cd9259b3c71eea7d044b35df268099be0b0fbc5951eb9cd2e6f5a5bd1ac56f. 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/ES64E2488468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796f962e5102dee210c1f410a01e26b060d0ee75a2b43bd991a71eff8e39a694. 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/ES64E2485894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43e47bfc4f964eef9112915ed006125523ad48c6760042331cb4da89783e284. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZK6F2440762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b8dc2d6fd8998d3aaa831d741ba21f594e65fac7ffeab1902c9354265980fb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZHN72465485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a10e845738aca4093c4dcfa9c962a4c117fbb97ddc6fd6d335e53c792a78554. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZHN72468647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cffd9504201c9805a8e6e0e3688dfb59f7c44808fe13935ac57d0beb157caa. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA2P2326316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212d71bc98f609ffd59703ecb3ed3f2aa03d1e91cc46d6c03b8f27df187532e4. 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/QZES52322878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb947127ce74d2a1be7af9b3e756f3ce1fcd272d745f21d5992ce62cbb6a061e3. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZMEQ2297154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57aa32381a6c17de1aac690331d09697b2c44138fd1a06b04de616c0d6c07c6. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZK6N2260518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffee46642732f657cacdff102e8b63895614efdae3367a6a8b59da9e474180dd. 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/QZHNA2204756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7142f96a67e0fc8aa6c38905d44057c92149ee1c96cd764aa9e88e767befc1. 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/QZDA42255014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe54570e7dca88f467580bfa60c4f3b70db7baa6a7083bb0a16bedb74684ee8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USA2P2202117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305b154a172b200e8af8ce8c5ac4d3e74336253dfa6ae86a7e83547938747ef3. 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/QZTAU2151164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba7cebb55a67f6f80fbb9e1278673ac0a649782590d300a3701fe434fcc56cb. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZNWS2161843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fe28a30bcc0e478002a70cd2683d79c888fd0beace3c28f09eeaf4b76fcb56. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZNWS2159456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb682cea094fe76ab11c5114c8b21d7158971cd3fdb0c5b8b0433c18630d96f5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNWS2163558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0c43617ca2e1916a726946a3e0880cff893f9c134b54e6a16c846c7f4616ac. 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/QZMEQ2134887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee87d00f668f30cc928fb54c483212c88870a6567c36c8ba83f9bb7f521bef2e. 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/QZK6H2157467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c22e8191fab85c7de0d33efa755b947c4fe7b852e5fc6492d88058060c09e4d. 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/QZHN62159262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3623e7706d24532bc5a35f98d04fb719b5e4ffbe07844451f4a7d3779dfa2435. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZHN92110492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5279d9020db6aaebededd7cb3619f06dd6e21f1a0d7d445501c165c23884a99. 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/QZHN72118941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60b070a45f2195db849fc85110bff216a7eeda263ada7af4aade579d48ffa33. 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/QZHN32194868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c20dd3b7ba4def68878d013572759d028a43902d77533f67ab236bc8a4f239. 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/QZHN42121999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d77fc3fd6190f0bba5da45ba4cee3516f8ec4ece419f6d018b38b708e5c1f42. 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/USA2P2325554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f02a4e6c9a8e20115fe210b2bda96b8597e104d85d2ac8f8627b54d954aaa10. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2325549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17cc2c27e945380a35e5a1c0d447cd05a715fe2f4a0087799584487911bfdec. 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/USA2P2325550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea0f764962f417031e415860ae81f25ed432b0156893805499421d3ca4092e7. 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/USA2P2325556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52387bab0a426be295e53244a33a61f525e9b2cc4f78878faa438f81f2dc2a2e. 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/USA2P2325557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eccc4233a9771b83ffe39292a2c6dfe8a26114d1e3b9d338dd1899e5a293560. 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/USA2P2325551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0a532e3e5ca87d1bee0ef141946a97e5dde1312e2ea59d4c8f4d7122a906ea. 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/USA2P2325555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9e213dd74fcfd598052907fe8f10fcc61d50b216bd9a9b5ad524df43a2fd35. 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/USA2P2325553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57d649ea9e8828bc1db40c1569f964f41354b77d10c269e12a55c5faee4c226. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USA2P2325552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0007a2e9ad635e41923c77f58fae63d5a8d4501a865efc7656a4da2f6309983f. 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/QM4TX2329924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cd605b2a5d564880026ce09d7189c38df229383ccc7bf4a9dd3455adc80313. 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/QZTAT2286495.