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 0x41c3f902d9290ed03e030dc991f01c1ca433777f64834c4a1374fbc51db22988. 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/3d427988-d0d9-4c98-88b4-688886a7d0c8.json and https://artists.proofprofile.net/proofs/artist/3d427988-d0d9-4c98-88b4-688886a7d0c8.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 0x7d144ea822cb90dbe8a0575e0b0dfe01f0d29fa94746bd31a1edc4d861d7bf3b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUITV1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b83310ffce9be0a5fb044ab85ff0e68a1077dd09c21461b0d9347aa3c9c1674. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCADU1869196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9e0a21d54aaf81746135bcd092ba0dc3f025572bd79fce89ca188b3dc909e4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/AUITV1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4e4df90d6377c3db587b103ded5223222dff7c5dae9f3b1c289e05452e9cd4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUITV1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1697fd2a4abc596764454541e5265b5687b49c91bb128675fc5f3ac830f42fb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/AUITV1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a80d4325fcf4c5fbea05471740b640985534a7effd111130c42e45a83cfbad. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/TCAEE1922247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4ee8e0e16c04be5dd9b98454d1b0e32893fd6e9a2a29ca76080c465f48b9cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUITV1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5729af41af01ee9ee319f94ecebca8c1cd2a2a7e73c39cf2ba5135e911ac09f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/AUITV1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90727a2baf15b15781be1b888bd4d41bb3e2948fb39dce487f43f436b26e24b9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/AUITV1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5cfc5fcaa40cdce4c61057f9d409bf8aecb78ca687aa26c87fbb4f19e2deb5. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCAEU2021902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77895380b418e966963f7300b35503a0be2c7dbd26debabb1c7b886bfff29dc8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USL4R2002264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2cadab13494b71be4e417f2b7848f48e9715507324d5a0e473c9e4c6854852. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USL4R2015662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfa1ba4d4b1b01817412a9a2db847bc5a88caaa5c474eb63ea44f974f0d7bcf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAFI2188547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2ebcb32b3fc2bbe5bb41de9c8a6402e1ece8b56418737cd6354289352e45c3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY42134804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66c09a8fee170e909d78d0837724e47d6bd535075d2a24a767a7b5a6a71ed5e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAFQ2189192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3e4d72d4ec69a82a8098412e5a9918faa112df34dea8031c509be0a389b7cb. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAFU2102495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0affef2ba489742ae5df584aaa26b402743b2a45a9f9c6b20b72c3c294848c0. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAGA2267749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bc531a7b9951a0fbfe04904b95e914f7ea49edfbd3c33f89cd81044d0a4fac. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGD2298190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de3a76480e3972597b311bfd0446f59f98851001383f76807282fde4bccd9c6. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/TCAGF2245741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b9c584c42e193a0fb08d5e785d998c2f37f08c0f7777674d7c15f6e7d0d36c. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/TCAGH2205410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bc531a7b9951a0fbfe04904b95e914f7ea49edfbd3c33f89cd81044d0a4fac. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGD2298190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d4f891ba2602ce4b22ed1b84986787936f6c02673bf6d4e80db6d9c2783507. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGI2201294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff4e79bf61bf6d63a4923673ed5f239a209bae327a1f503e0e98357ca24fa5a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAGG2268486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fe10537c2ad9b2f551ceb1c4cf1d82eb4971a5d57cdf9f286eaf37b56ca8d7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGI2201298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de3a76480e3972597b311bfd0446f59f98851001383f76807282fde4bccd9c6. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCAGF2245741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4b92c8e91c6db5011c98568ed5ca3d3c8ae46840f80425a8245adbd6f4d0f3. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/TCAGI2201302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe672a6f7e95aa3c200baeb121136d4346702128276c95f804022b4ac49b2fa0e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCAGI2201304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a964ad8087d9ae07a0af07b8ce83d86e92762b318fc1106b47e4a2bf81468b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHD2330282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d7010e52cd865cd1b34fd1a0d4c5c9a0f35ddb48ff7ca7bdf1714ebdcb4ea0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAHE2382909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cc0893dd2400be826ee23c60cf69c25c27250ffcedb9987fdc69497ca6b7de. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/TCAHO2313542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b64f108051554bea205f1896c5508740a6d22333cd5670635ba8d72898a10f4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHT2450766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ecf757d3b0ff226579b0fbcfb3c1febcdad0e185520c559e8398b4da79b225. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIA2474413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27c745f04015cee57c44ca14944d8e9e0aaa2cbd58fc2b68cf68c49223d7b30. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAIE2416265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8787a4221539a8739b5ef22ae5daa45f21479b3d981bb2f8e60dfd36c7927e78. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIR2454917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fd50690ed8598c25f640efddca279e0cad7f7f108a42b77ab5e21d766baf0a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAIP2495629.