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 0xb4e50ba68ce1caccfa44a7491de19030e4e13cc76bb14a38f8c24a7c18a42b73. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ce337ca-8bb0-4b1e-b3ee-67fd24aa1cb2.json and https://artists.proofprofile.net/proofs/artist/7ce337ca-8bb0-4b1e-b3ee-67fd24aa1cb2.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 0xfa5cfb1fc33165b643de99c2eb2c991ac34a5f90099073c9ffba0b4e5231ac05. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZHN72041199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1f74ca989b5760bb8dcd4a3874b360ab0276a875fcc08b2108a2e071cae711. 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/QZFZ52027891.
Jesus, My Lord, My God, My All (Sweet Sacrament)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6696f47c55e8b6d0cf379d5bba82929581378d28a734bbdaad6cf70322bde25. 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/QZNWQ2142260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa072a1fbc6fc5189ce882b62c9d67013644c9691d885d30730adb25fa2466080. 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/QZNWQ2142261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b145df795f2446b2eed163b61a6ddd7a12e1fc06c22a3a9c48006ae0b63fa78. 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/QZNWQ2142262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48419546c853d331df7110d85cc8cc0ec328d0fda1b652b4538da1358a4c16fb. 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/QZNWQ2142263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510ecf71861e549eaf509c8c044913e44453e78e522e7ccd70a85c83df953ead. 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/QZMEM2164579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e2e665d21cc26ffbf6a8497e511b494eca44d9cea0282ef995de75cdc12e44. 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/QZK6F2199370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230dc9bf2efc6d76151918a2ce189e64b5e4ded512195d6a680fcebcc122ace0. 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/QZMEM2177321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbc4dc376963e500b44fe67e4d654677928a7287f9a9b65890522dd7c10fcfb. 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/QZNWQ2142264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf914ce03d128fd5c7f860850a0d93ee129dbbefd577e16967f613bfad8ce913. 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/QZMEM2163410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19c3632709c02f455100b24dbf35c4070dcf1440295f097c20a65327bdfc07d. 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/QZNWQ2142265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eeebd5dce0852b7a6335a4eb053c797bc582ef01f1bb77af2470d9a7b5fe13. 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/QZDA72208375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8d3c9a72c22fac79e86c8d15a8183e8e8283c1eba49087718ca5b48c328ada. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZK6J2280639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11e182ebe3ab422eae6d1c1cc5d31b8633cbb1e8c1574a289f880abcc0352d1. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZK6J2280640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5eedb16e5696718398b3d432209323620b4430b36f6b7fb9853c3875e8ecb5. 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/QZK6J2280641.