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 0x6d158b7d480ff7a47ddaf772cc2a20985db5bbf9c268478e36bca36124e4ce23. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea5f7cf0-3d2c-458a-bee6-13198a3ffa88.json and https://artists.proofprofile.net/proofs/artist/ea5f7cf0-3d2c-458a-bee6-13198a3ffa88.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 0x195b7d3758b1e2b47a1ea9bdaecb890bb5727a0156fe0a3301301d241fadcf25. 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/DEY471612063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11a802b52cc9ad10ab2b6bac80af7d7af82de8bc27d33a45bac634d194e2edf. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEY471612064.
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 0x5b2a0e72b2b2366dc22db4b6a5b5d4a08d8e5cb87d51c163ccf34bac52a81bbd. 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/DEY470925808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3523a354fe86c6e5116e2e034006b003f0657e996f2c2ce4b4124e7677d179. 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/DEY470925810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3cbad588304896624ed66fbfe8b9c35d579c9123581ed0f86c03f5771a392e. 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/DEY470925803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649753b52389c9558ecc549a61c967f62bd8efacf0e3110bc67251a9d8e1ca25. 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/DEQF71200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b404bd4d21c5b691306ee6a831a0df4f0f1c6a1f4513256446cb72775bce761. 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/DEQF71200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e58c794402bc42238ba62fac4dd4def2621ef2d96a43fae6c7d824148ddb7b9. 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/DEQF71200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb72010c670ed252c93d688740eaf649e311ae7c7a1d4c09fe108273c802bdf6. 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/DEQF71200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa627901a264a5aff1b6beb863739a7922ed7a253894bd819fb41c276ce11fa9f. 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/DEQF71200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf29115a919b337ea628f45fe84d8c6ea7a911d191eeaf623f5148280fc8f9b1. 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/DEQF71200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a41c64c6542b15fae3098a8c7a837642fb89bf7865970fd9df8573abc13b70. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEQF71200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7e44b590d974d2a05e36c2b67733498d90efa64259982a7e4f65fe0c5722ca. 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/DEQF71200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f1bc1f832971aeaa4274b3395c14e6d6f233b95f33a2315156ed7fb0a27027. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEQF71200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49062c94094173d4c0e79efe7b7d87c5795107abe6096ee35c3b9631e0d5f170. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEQF71200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c5cba13ac36a8988038414c543db7789539570b101809b506731b0cbf76fe1. 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/DEY472173026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ce34af99dfbd83ef8314445d8de619e144e16b9cb2084bef89cefade93d69c. 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/DEY470930517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f31d86ecae047ba249f80df774ea10ddd72117cd1ff4c2d386572d48d9afed6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEY470930516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6019c8b7ecce54bf41606da84bf8b50470b7041ba3acbfcb57138a541b18c02e. 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/DEU671101811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cca74f4a7d54c640314239907b5990b99243a2e963566998f181f4c2a02943. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEU671101810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eecd18d225fa1ef9a339af1780e281e030b26d914dc653da5a36dcfa47cc33. 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/DECH61000116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da94f8c035f46fa92eeb28b6c9705c04fe421586f8b4c233ab5727ffbe51e48. 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/DEU671001187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd1f6f91698626e694e6a39c830e11546402bd59a5225e95f1e35fa8419f293. 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/DEU671001188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63626a150def125c0b403b6e7353ee91d7d2cca04ccc95f4059ccc1be22a9306. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEU671001186.