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 0x768cbe136457daa6041f4405348f83647fcad36a7127dfd0dd9df6c14b65f402. 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/e0ff3a3c-06de-41c1-9f83-a2b577f008f2.json and https://artists.proofprofile.net/proofs/artist/e0ff3a3c-06de-41c1-9f83-a2b577f008f2.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 0xfe5b384cf8c9d2eb52c97fae6a65cf24bec3983d67513434bccbd1e5ffe81df8. 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/QM4TW2322356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85f282dc4ad7d0b0acf1977e53ded8de71feed37271e37812f741a96470dd6a. 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/QMDA72219874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915b4def76343d30c75c21bda9761b5de032ae192158e40cdf899ec184ed84a8. 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/QM4TW2568853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaab3bddf2f6dabcb743cb20048fcd678db531dd3c885faa5d2d1903bcb2247. 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/QMFME2459417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4671b4bac843e2448d0ded37861543f60b4e0d897b019211f1dad46f8fdf70. 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/QMDA72478177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f15c59110bbccf5aa8ed121cb7e35468e354cf42d019576a8543f59112f6e1. 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/QM7282450373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b54a4fab090553ab496b920c972adabbb67ed27d34279ae0ce6af76e586d450. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM7282450374.
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 0x4f44e961afd1b9fa2ba5e48d59f156df24037c58e501cf0325251a17ba55b8b0. 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/QM6P42494663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a8d6b16fae77618263c1dce13b4f8f8084b59433f8ba90576b79b19466dac4. 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/QM6P42441387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7092026c8d8f56312ab9d32e40cb48bdf5f970104fd5448a73abb66165ef7a. 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/QM6MZ2439361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e7ad248c78bc390ddc65b4ffc5b9b0db8cdfeb453cf0954554e3fa99d97798. 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/QM6MZ2439363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd095b18717b8d04af56e012afdc0376fed5891d65722fb218037091c73e236f. 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/QM6MZ2439364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd042199e3ae53508dca162085f40b6e756afa8f4dce4a86158fd9aa4d9ca6f33. 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/QM4TX2497043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2e9d05ac7aa8d24e53c92ac7d25f0a99f280a5e0b4b41eff38c9a8c24fb4a1. 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/QM4TX2460043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ffaf6c53abef532caa0e670e7a8d34c06350c0c0d025cc0caf49c2af691362. 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/QMFMG2367713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108e180d529593e05db9da802ee939f0215ce51bf4bba1e1e6eb7b163a383815. 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/QMFMG2367724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f03f9c9fe8e6bc699711259ce173e0a3629f837b788c94f9c3506433d0dae9. 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/QMFMG2367730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd00f637c439c7b9913df81c462396dea9548a8b83e16e6ca0ab1625665d5119. 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/QMFMG2332494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fb73fd9d2add458ef0241a05428d4d27edb4d48fefac9726e10e49a5e16e87. 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/QMFME2377758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968abdc484cff031b507d411cfe3570c4578370983e13ad1da616856d5f12f77. 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/QMFME2354043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30686754ded015d231a38dcba7a9999f991bf267671c42e54b8ac2b1a7342186. 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/QMDA62332465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9376a1c751508956bd64ab55e03fd7410a4812238d55315f26aabaeaf02f4d. 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/QM6P42304872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d81beaf2086db43f7b149e43e9e0a0e30a90b94ff783ab2f621e04f1fd497a0. 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/QMFMF2223115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204b0b8162d2cb6bef133519f5c5855328adfb2a6d688495912b71a8e6afcefa. 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/QMBZ92283978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef196c70ee958e14944f293df96155659bcf766dc582a50a1975d6ff8dc86386. 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/QM6N22252549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8d2014c2ba1656e372ce527a73f684b14816d9393277ab77149ed0e8d282cc. 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/QM4TW2277571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2728d2599608ebb61abbe8da1ce3972ebe99db8a1a6723dcd5ee9a8d8e299dc7. 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/QM4TW2229031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc3d5645dabd2716a701737c758404094535aeb21e69c28473f6a953632114b. 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/QMDA62165746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93640276d2a07447882b36e51d31237852c942da5dae22c7e738edd1ebf38dd1. 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/QMDA62108015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15e0229a7fea901fc86362444c8e0d0b068d6bd5d17065781bb40633736a8b1. 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/QMFME2190415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae315da18239afa8e0e50c01490f753ccba141a7c157aff8add619dc4ba1a8d. 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/QMFME2103593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619bdba26525d9357ba5afedd3e07c4513bef943b2f14309aa995a5e28592012. 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/QMBZ92180598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2383c10f45236b6b15806629bbffb1a10f8ac0238b6f6ffc3338acb2d781f2b1. 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/QM6N22161621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387f06947e46953360845579c77b5b28210b32e31e8bf9dba34f6c3ff453a530. 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/QM6N22111692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4d944caab39c9dc3361f60761160ab2d185d7b64f5e6ea22107f94419b63dd. 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/QM4TX2175110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc93331059a02cdf68011dad8b5a91efb8ad7d7106e7d4a2f33dfb76f4ef020. 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/QM4TX2149794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2093a62b655074887a6085fcb49f7d83c45153e2013e29e79fb4613f1a3000. 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/QM4TX2100773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6338889dd0d4e180d695580162c63a8ee2f1f4a966a4ddfd3c1a41f14324995. 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/QMFMF2001226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b898ecda4749604963121ee5221cf8ea2fbc83388a5150a668a51d23f780b9f. 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/DEE862100185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7634700fa062eb74077e1e3d1d1b3dfe95193c96ba51e0992920dd8d10129b9a. 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/QMFMF2004708.