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 0x85cce254654ed25b4e788f80551d78ec955e185f726f0aea0283946e132e9be6. 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/02807e40-bb77-4462-bf4f-73c92359d791.json and https://artists.proofprofile.net/proofs/artist/02807e40-bb77-4462-bf4f-73c92359d791.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 0xa579b1a71838e86a8a8d5c83eeb3f9c48efc24fed414478b6e91045eb3bb24bd. 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/USACX2400563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa2932d9438796a572908fedb1a7080880bedb24f8df8fbafca0d0f5769f1fe. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZK6H2243012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa400012e656a0b4d0488d460a13a0f9ace1d2d65ef3beb6bae4375f16a5eaa0e. 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/QZWFL2445002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95286a4dc084deaee7cddc950c30f4ae4980bf536a7a38c608326dd53498f957. 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/QZWFL2429499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9049706dbdd8adad40d6a4c64ba3f070f707a6dc9c1dbe33ff6b252f438e67. 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/QZTBD2424448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206f7931314318a9a81f8f6cf73a96b6ba4f8148350d40738713f83bff08821e. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZTB72457563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0cf110f33b0411b0abc6da24dcca7ff6a5278f2d250ed8b4d7e49966920cee. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTAZ2432850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7975d210b10f59f42773978c97a6300623fd15375d224e08ff3c2b07f8af4d3. 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/QZPLR2470837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940656f075cef289263c82349b645d4e39547212c9f88e259275e8d145778ff6. 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/QZNWW2402150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f97ab2f46d28f414d25214ad3f2c3b68381d7fced2f98790091d8365d9cebf7. 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/QZMEN2435275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8297187c3f248c9c62ababf3738255dbe87f16d085421716b15db7c6bfc33cb. 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/QZK6N2458501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f6ca02f55210616839374e6107dab7222e6e2addb9451672199de312c41770. 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/QZK6Q2426200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43600f89af7a9f11371fd18439d19376d2a5a73a7d4269416299db41e6aec0f8. 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/QZES92413562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8aa1af668a596519ecf6a1ffaa7ac6cfb0a20623f5beb28129ca10da9bb727. 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/QZFZ62458379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8b4e5cc6c80fed8c7dc697395601011281102def561c595a31c28dabaf0740. 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/QZTBC2338731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1168440cc8ac610930229b4c5b30d502ac57cbe83f9cb925fe7dc4b47c23862. 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/QZTB52348462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0fb358692970c68e69b2375f8d0d55d9298164556be9254fdd6b5031069834. 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/QZNWQ2370956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936f2a71bab9bf96f380e76d5fabeaf52c592ce53b2c70cc427eb2216f85da65. 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/QZK6J2351820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912e88922ee8c91179878bd7fec00e1b44299357d9c4e7f58047865c97f4759d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZK6Q2344898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545f78a3a821b5b3ac6ff9cd142d5f6c9f22f7f472a4c04cd7eda5f5ea743546. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHNB2302618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064a0acdcf92226100337a2f09e959c850fff43bbf73aaec4272fda8db119be0. 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/QZHNA2399254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa732ca5540f1468b57d231235398dbf53a008b5f2741d83cc52f3054a0b9e0b4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHN72340562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e358be45e218750ca65181c0b3606990590b2490a196783b698e262ed07e69a. 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/QZES72392366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98eb666bdd4a4e2d7a509230dba2520fa832c2381b22bad3c26a93f4184474e2. 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/QZFZ62381629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f5d2bcc1c148d5e9a19416e730dfbc3281fc7d9e7491fe1da912220ee4048a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZFZ62377668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd3b30e9d3babaac0a682c38137bfd917c17be1f1b9b883a84da9d91e199db0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZFZ62328198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf105314725b13344e5362c2511f639948edeabca6ee28507d18db2f3a2f5d109. 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/QZTB52220135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9835d234ec63270001db93cda994a8d030e0f6e9e80eacf1044eccecba5600. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZTAZ2258843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac61b1110050d111d3fc8563285db0e4bc0ca4fd5368e9ff560df1fd170c223a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZTAX2279142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c71abb14e33a50db4207ff797b09b5be4d5be80868d4ec424172859fc24696. 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/QZTAT2287078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e96bcc5b9e58c64cbdb1f79096b19c5efcfe096b49a9115d59107eebfbab466. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZTAT2251038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5f23e03531e90eff67735b673447923e3ae7240e57ee4c52bd8549aa386793. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZRP52270010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4858bb76abc1182552a039d0fb638f3c2e266c392c1bbaa43844d3ad9775bbb4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZRP52228648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bf365f6f46e959f25d783ca98ec7f5044d10f35ccc427a4c9e9434c4e30a37. 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/QZPLS2270371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d2e33921ae46a72747a8ff488505ebf2043c356574c903899d5810760cb3f0. 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/QZPLR2230292.