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 0xe8168d0d3e5a796a5492a3a2d2f862e25bee6aebec0355348fc6fc66cdca7647. 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/e05b9b3f-d0a8-4fe4-a273-155df48d7c12.json and https://artists.proofprofile.net/proofs/artist/e05b9b3f-d0a8-4fe4-a273-155df48d7c12.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 0x3da04cb9b8f6c8c84c6cfe1730e2b16a7824b9c1551a6c56e28c64c94a284770. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPXF2120550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f5485d9cf5f65d966db2908572b8433302316cee0ff00e3bc138eb47381555. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPXF2120317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d45ed84b8bdafdedb48bdaf7e5328feb3045000b444ab7da87e796866563479. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPXF2120320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb744437af14c63edefdcb24af4cee4496652b1fd082dea4aee6532733c32759. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPXF2120639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2725bb8ffe4e7106ad1ad4e083addecb8baa8c096442b83bee7fdfc7d6666c1a. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:41Z), 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/QZN882250351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6119dbf531c61fe16cf7c12c2b72910b8723d4fc59c47a46f4c34f5e747a6db9. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZN882264713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305739160cf1ba50b1353f79054f31b247010a59fda3250761863c0cf2b4fab7. 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/QZN882361754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807669bd2b9511b7928aa5bb2e9c6a7d678eae87c891714c1a19f702241453ed. 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/QZN882361756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb13b4e20e4b49f4e52e55aea33c6bc8299dd3b3af79f21e7e9e822c197664a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZN882361757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477a9ad1a6b664b295511bc9ca48405a14ceac24b5ed5d1ecfdf057ca32fab40. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:09:30Z), 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/QZN882361760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8d2beffe78146c6017f6f1cceb827f336a1f1bb3ec65396891189b3c11acfc. 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/QZN882361761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7f8e6e6888d9aa0072504fa9a0920326105faec8f4975edeaf4b08d2584a51. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZN882361766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f97501fbe2c486dd272e1c096d7e99ada0fea2f070fca75020078bba7b2f0bf. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:59:59Z), 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/QZZ662343814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7967dc7a630c20fcc0a04cf9e96bafa1f63b1691b9a65e37bb215ab009ddc3ac. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:59:03Z), 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/QZZ662364356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54406f53535006f880019d6d40f736589dd751027ca808ae12da06242ed6ed90. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ662418872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb548faa1b069ff647894e0d6bdd6bf67f3b32b947ec5f29b53e3490db5037494. 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/QZZ662495243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7f719591e59d6e7f2d2c75fb0b9e082bb0ac8b15f2522b9c9f0fb6cdb34b7e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZYFZ2440391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0473aed918584b3f78b58a3cfbbe15e602a83792c24adf24acb914d57c67063f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWDW2430614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8b725b37e1804f0fd093692979dab4f74d07c20aca69941cd07bbf86fd1407. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZWDW2430615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d9b34e8ff4aa5bfec0962354b6ba1f03726e173a1d429bc963a9fdb73241a2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWDW2430616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95a12928edc26a0f7c9fbbd01ded010604f2739965bfac3ee685c70af4bbdac. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:30:50Z), 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/QZWDW2430618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcac1a22e6b575af685c9a95e680d0b326076bc0e2b82e47231656b21b4da4c0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWDW2430619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a02042ab48c01f7afaa1a22ce73654f3eb372729bc892f562b956ab7b7688c9. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:30:26Z), 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/QZWDW2479534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30219eab2f644cd65a16708728e8be5c1fba29acc97916e6a4aca2e285a2c235. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZN882420698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5156af3294a1543adcb9dce9d81956a1003865bc685d77b3d7c7a9693e1b8a96. 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/QZWDW2555466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf11ccb36c739a1c8b67a610b6baeba395185a153639bd3bd14dc65f31ae4d07. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWDW2555467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f18b820609abd83ea9a5fda47f289294aa6b6fef99ab9cbcb6ccc193921208e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWDW2555468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fdaa734a30254a415a396a05e6c40f183a9f148419d592564870cde67f6fa1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWDW2555469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd88250398cdff99aa1b6fe8d331266cb327c4dd6470bc987f5c6e5b7182ca8f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZYFZ2510419.