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 0x367b9c7d1b9d20ed13e8f810f347e64a7f0e6356ea489f446c0097c629eec4b2. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75f1aac0-3abd-4172-b5aa-61326870b3c3.json and https://artists.proofprofile.net/proofs/artist/75f1aac0-3abd-4172-b5aa-61326870b3c3.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 0x2dd720e9229bcd9aafc17acdad9f9742847ceed0b1bb3b83a49a878f8e19f7cf. 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/TWA451800601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4609fdd1189eb802972f777c0c5686bccd8aa437faa8c02a98895537d2ad82. 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/TWA451800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075e35e7621deeff9a9b1857de68cbe90a9a960f555d64d0cb8466ff5699c797. 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/TWA451800602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fbc582d24ba41149faefdeee41cc43057861e8befcd6078a3cc7f750704916. 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/TWA451800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2cc05e0dd0daf0b2231decc821df038ee460423e6160b2c6dca24545311ad0. 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/TWA451800603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2553194a62f9e841c42e9eb65c094a342e96f11f4344a9ea6237002a43d08c66. 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/TWA451800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb817dddacbd0441757b52d75a9cc0221ba04ac8b37243c93f05ae5f4d397b918. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TWA451800604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90b4273b40cfaad9756e5a238027ac6671f2333ee372e99fd9816873854c2c1. 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/TWA451800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6c2e9b41822075908e46c7abe5332db95630d906639cb08e9d17cc0ff2bf37. 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/TWA451800605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0b64cdf97b45dfc9f59cfc3f7e26582d91882d5e159a4c55dd531d824a29b3. 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/TWA451800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0edcb15be91b1fca10135117ed70c095ede7ca3a78b9356ca9df0992b2443d8. 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/TWA451800606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2553194a62f9e841c42e9eb65c094a342e96f11f4344a9ea6237002a43d08c66. 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/TWA451800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa913460c50f22ef2757a6337ff648c99aaf9c3a85e938d07b3fc7ab23a0ecf3e. 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/TWDD72203001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18863b6506c93a76a0119184cc483aa7862d054eaa0a3fcd73451ca27ac818bc. 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/TWDD72203002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665bcd26defa0e79fb5d2ff6cd55f0af7fc2630f12e342e50fbbdbe336f485eb. 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/TWDD72203004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd3493324aeca3b8c0bb9ddcfc78f4b19aeacf865ea51f61d94c54bd082ec7a. 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/TWDD72203005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb808478b7a7d3d216cf1c3bd6683331912889c4d0bfc2cefe2a1e6f2067ac435. 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/TWDD72203006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf5a344644dedd923c0385b5b71df063e975791d12d2b383e1bcc39b0337076. 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/TWDD72203007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02e099931f96b828a7ab6f9d7a40cb4256f565babb63b5fc648a128c744bd1e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWDD72203008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa364e7b6d7ec09b0afd1b8c20240eddb02efa3897ee3e3a82c0386a18c4d78a0. 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/TWDD72203009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f1eda8b9f07a2493cddcec4cf24962098dca1096cc8cced0b9e85120ee19e2. 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/TWDD72203010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9a9caf6d9f1d70e70740902f5690ce5901c7205709a0f21f4dc8eddcd22fb5. 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/TWDD72203011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d18138640b75fb95b455e13d0e344f804866c4908b3290ad5f4e29dba7ad75. 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/TWDD72203012.
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