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 0x243247af0b314132821192003092781f24703ad0d788eead7d79e5d059f50bd2. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f6d066b-eb46-48aa-95dd-c0eb77642a9b.json and https://artists.proofprofile.net/proofs/artist/8f6d066b-eb46-48aa-95dd-c0eb77642a9b.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 0xfb262c417466f3b6a3b550f46e22ceebe03d29b75b8fb86cfde8654ca0efc965. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEBW21200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad01586b480128bf86ddf4aef2b9f0b2b47c18623f017c71b8a97522960a3d. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/NLCK41404435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316ba8072e2e711dd6dc569a0e7fe2883b631213b61eba0a4834b9f14c916927. 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/NLCK41404436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e69b78582e4fcfd54473fcd527fea97aae56009cf1faa7af8e23196ad4d9d5. 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/NLCK41404437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf143682af3cfbd9086573cc1649e9b33e509c91f72d727331ee2f63980083378. 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/NLCK41404439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d369e34b7ed4c456648a7cc081d82520e492017ab97232587447c5cd228f21f. 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/NLCK41404440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d95b2d299f29f2de102945e40f75332266a2335c316c5a4df2223283ad63251. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLCK41404441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b888dd95050941a3aed22bae9158e70a0b2ad7c115e02ec897d7a18dd78cabb. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/BEN582200466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cc4d31d46e56f21a97b55dd0175226477ef28fe04047ea98ae7ba44f983ca1. 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/BEN582200467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dc0eea83122e45eb4cd89b5acb5906c69d1c4072315b802416c13c5cf04537. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BEN582200468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc268f82634f0b945fde70fa2ee77cb3762c188d0bdb9a08e67b10bc4847e4c. 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/BEN582200469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03510937f216756bc83ab37dbc988a0889395836678c08fcbf0a8014afe046e0. 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/BEN582200470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf95bc6ac6aeaec2e94e2a7152a546b2856b7dfd7e7d3a86e33577c5eeef19f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BEN582200471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5773c21c286c2e86eea18f10823472b46a0bf07526c03acc7e9b9f286a425f10. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BEN582200472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1add40df44b0b893c1c4622f1068ecbaa4901012e8c0c46f627a7539fa233c94. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BEN582200473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23df09ba69634927f220ba881bd0e8d026c3e394008427be454e333753a1d9da. 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/DEBW21500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3eea5264511ef96d9347c5d01e5c821b13d467dcb5f7088095a9ce24858b962. 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/DEBW21500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47ead969093b1d92d2989f45a83286c7e8fc99fca88e2b3d777f0e782044b87. 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/DEBW21200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8e93c1d5025f22216b9f5d196cb74f8b8cbc8531d0328854c92d046befc14f. 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/DEBW21200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05169f2909099402e19dea0f8caf9c89c90e53b761a0e46443cf1c78c424c48e. 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/DEBW21200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a41678d833bd1657d414e48cf5c62aebbfc322a65645fa626bd9f82212af38. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ITP160803758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164007b69382cc6f0d0dec754f9eb19b381160a985217bcfe74ff2ae2d97eb5a. 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/ITP160803759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d0c95eb6621f96a70ca9edf014545cf53c963b37e8e0618de23a5279fefe6a. 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/ITP160803760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47013aad140a374cabe7c6de006f07ff2583d8e6b3ec88281404ef04842f8c77. 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/ITP160803761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09712c9e5d45ffd589e9411df5a1c6fea6d9cfef3bc7073c4f529bcb23c16d82. 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/BEP860800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc983fecade625c57bc215ab10b4829e0a009014fb0d9cdd3404f4acb407755e0. 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/BEP860800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53c545902e3837d17458857f011917cebb0426426b7e7dabad6d8d671678158. 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/BEP860800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723334e035b130a0b616f241ff939dc9ec3443795ea50b3590d1d137f9d56cb1. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/DEH740702686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990ab3d1e9704b1e539e66eab794e60e9afbccaa709e560e9b79467d50e64aa2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEH740702689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe208e40fece80e6a730d9a9ccdcbe370a82f6e2b9ac5c4e61bf8fea5e37ac3b1. 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/DEED10400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bc94d60edf56747eec4fb5db77c25262a3611d8fc624a6c50cef6f384b9ce0. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DEED10400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd1596370b92ff7c42eab2be9ec946783d98758b042fa05e2613ed1a7fc9f05. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/FR6V80601481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a49d0b594f44364648a1a98e8347f7d99587418d2930dfbc61f89fb0b71fbdb. 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/FR6V80601502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6ab72c2d3db40adb41820b937250703e6884737849e6e067039b5d7d301d24. 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/FR6V80601486.