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 0xe6b0ef03ff8d6cf82c03fcc70bb765c19f6e437879d52f40e8c9c878a2e7b270. 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/0bd47b1a-b6e7-471f-ac1e-8f3fc3926b70.json and https://artists.proofprofile.net/proofs/artist/0bd47b1a-b6e7-471f-ac1e-8f3fc3926b70.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 0x8001ca38bcb55a88bc0083968efbc7dc610086796187bcdc23fe0cc82407a6d2. 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/QZHN62131125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7720ac5369c2c6fe8bd9e8324c031b4fe6f783f0230a3751458fe109964660a0. 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/QZHN42123353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030902d984a3c8dd99ec2aeb363d22747948aad471ebe29c4061e5b6de059b20. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA62142976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0f375b33c34a87e484d64f7d7db5b04539c6da273c3922357867758dd75917. 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/QZFZ52170412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a84b3758833ffdbc4e87e2fea7d027a842f2d8983e7b8176065125c4b94031a. 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/QZFZ52124754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a62b7b27c80e4d0d90c72bdb319789ea4a54b60a120e26cb0e7760a69c41cb. 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/QZNWX2005277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e46e350660cf61b92f69877a0c9b7b5bffad8101b743b02754d0abe25bb128. 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/QZMER2019939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fb563744bd2e8cd1d6d376f98a48adff3aa165fe2b5728f223f9147add796a. 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/QZMEP2072162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3a0110386632108a3b77c26c580dc0a15cadefbdb38c3c42d629ce0663e776. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEP2070953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbbfd9485fb7b6dfb449b7c1ea3f8f029ed6330d5a07bef06e9f09b631b0baa. 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/QZK6G2053342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b8591c063c143543b41ea1215aca07bda99bd77f4c48bb1a7ccdf1d9a832e5. 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/QZK6N2001884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddcab8bf1829dd4ef610cb70d754730a487ea21142ee840d21ea6ba6dee3d3a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6N2000240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dafaefc9cb9fada3efb95b1da1283311b842b07bbfec529fecc5c2228ceb76. 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/QZK6N2000910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61ca3d002c0bcc2a2278cef6dded5b3fa32417bc73c4f6466cdcf4a98ef2fb9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6P2083061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d741914b1268c76c799b3eda8481779476dc17a14f38a6f8f059f92748c43c. 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/QZK6P2084036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4bce575cec9ba1765f4f7391a89b04302aee740737fde16c0f402b0062c98d. 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/QZK6P2084011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90737e7c683302271c0c6eb70aea11844a1a944e4b81a9fc8a90da77cda6985e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6P2084029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30edd87cfdb06b99ad03af1aaa1af7ef9892e2896f273a066e812add12821d0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6P2083064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc970212dcb85c78cdb3bf16d0648a3122fe3e0a35fc4093eb2ac6695a3374f. 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/QZK6P2083033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb43f90ee683aa0ea0c9f3c3f095d81a80afa927ea3de12ac90278b358e11f75. 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/QM42K2105736.