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 0xece637d32a1afb7e08ab2f87f2205e5fc9c49bf6bf7f629b9469d568a86c8059. 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/3ea083a6-d048-43ca-807b-6cdac2c21920.json and https://artists.proofprofile.net/proofs/artist/3ea083a6-d048-43ca-807b-6cdac2c21920.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 0x7377890daf1392e668bc2cd4469c40460e350c7fc22c8128e596a1325e18ec59. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GXBDT2396158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c2fb16c055ebfbc4dab85e4e24f9e3ea83b0b7184e62db8e76fee01e544f88. 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/GXBDT2342770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91307a1a08d45d8f3c1b094569a18a8faaf4bb99163afe35b66aa4acbcf1f8c. 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/SE6I32143845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec407c97865cf16bccd19e7b1bf3a3aa3f297f9ea5779ca4e2076f8d1088bfb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWZ2049803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e1c94be02a97a450c824399fcf14e65e4ba4818f6f3838402fed77af772d8a. 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/QZMEP2032702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854f7c519628bf081364172bcacc5090735101cbe0f2f840fc7bfafc9ac1cb0c. 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/QZMEP2032709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf38cd85d98faa95332c7a648f47e79590b163d10e971850a399cd96e2297e5. 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/SE6SA2011367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372902b4f63b5894d359324477ec702c6ce2be73958b656849acb45af7f82fe9. 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/SE6SA2011368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6805348f0cc6a0264a8ed46364ca5e76bbc6f3a0deb07f4068b798ca4953a157. 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/SE6SA2011369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b71829537f2dc44b09a6cc0536e0c3eea57ec3b1f4a302f7b0546b11db929b. 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/SE6SA2011370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f999d85fa8b000aab8286c504c076b7e9cea5c19ff6e8f572ede69dedb94d5. 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/SE6SA2011371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28b075ac04f86d51dea47669067682c452b8b855f5e77d691f687edc53f0ea6. 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/QMTND2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae6a73b1d7e564516d8239f776b12c34182229184439e42159217c7d4758ef2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMTND2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8429e742959f189f7f4d3dfc2532879103af9d05938350b2694a3f46c6b5148. 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/QMTND2300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876b995268ccb4a3826e1f6b05dbc85e98df9ceaa5bf6a540c82259035e28528. 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/QMTND2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde21edf94ce093b38ee6d5268e5771a36ec2790ae9e1fd5532166315ec883c0c. 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/QZFYX2491172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666d8b3807fcf131386e03e6be134c870bf8844505b350c6c215b1bc78ef4b1f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB72409232.