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 0x6f39e9314848300c58a24e5d3bde471e6a0ef81a9d12c313dae9632aa25f84c4. 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/d8b6249c-522d-4046-a374-b8961d0927ca.json and https://artists.proofprofile.net/proofs/artist/d8b6249c-522d-4046-a374-b8961d0927ca.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 0x4a16556c252bd7b073a6b874d997d0d8f718a06743c1fc33463994c52276fc23. 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/QZTB82377355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124b6d2898049cb6efe1543124a98980e3aab89f563570f842c61322f48a1d80. 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/QZTAZ2376568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5f9cb869654927ad648595b158588068ae1ac000ba5e23e597536903cbdc17. 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/QZPLS2376421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278b30f9dd180747c64348908a1ac4bae0abd6aebc012d45ed3cba4367ce95e4. 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/QZNWU2395843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd416e8b855dff08a3c34ccd83efafd37c176519d3eef39c63a2070b496d12dc1. 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/QZNWQ2321238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99c16499c49d2e2f82292bc36b2668feba5b34ef34eea79f3fd71f75fdf2b0d. 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/QZMEP2392830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35bccb83e614d24f1125da313f943af39bca696ddcbfafe75ab5d5aef746b72. 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/QZMEP2392831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a815290515a0cfa66ff9f9dcb19b7309b9e88b46cbd3720fb64aa226556e13. 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/QZMEP2392832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ca647d3f6d7e34e27e235d9ce8b3a3a5762f935fc987ff6a26906979fe1f9d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMEP2392833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49488625134ee341c7e73dbd29c69b115725e2fc3cf3d1514fd3efd073b1d25a. 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/QZMEP2396496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f98bd9bf3a3cedf39e43438ad2354686c745f938eb332ac8470e2d6f8be88ed. 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/QZMEM2362105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b25e833514718880f887d1873d5e481a19e5d7777f998f44053d6dd5ceab186. 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/QZHN52382663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37273be1bf55a8d3594a40ad9839236981eb19eedaf91e33b7f15c2de55f726e. 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/QZTAT2229639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a61bae207bba40d3fe8bd02f69029c0ac20b6eefadb2536eda1f095dda7d74c. 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/QZK6P2251199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9873aa00fc490b101c5a5a5e6b100a2fe3a39c11f311abc8781be2af34a8a4. 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/QZWFW2484646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4cad1dfa25138595eeefa7b80e5836ae53e0acb869b19eb27b78ad25ded1a7. 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/QZWFF2436982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c70b83f3d06084ce78e5f3d0b237bb77d3be6ded35fffee3cc4d06a7e8b810. 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/QZTAZ2480759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97cdd703bc7dc0c4e34d4320f1c41e98667050e4034fab64605590192a8dcd4. 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/QZTAZ2480760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f10b716c801f35c160fd98f77922abdf8ca377558046dcb066e69ee2a012efa. 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/QZTAZ2480761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fb62ca852e4f23c6c4e8f4c4501616978ce5497707a620bbf60279781732cb. 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/QZTAZ2480762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c8ffe27cab3efef5f447cfd82029f9b84f0c1bef46058b4776315c08a63688. 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/QZTAT2412377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e3cd29cd14b66301755eddff453b7dbd3c6162d89528f1e98643c5d015548e. 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/QZNWX2409330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6645550d3d69125119541208871b6ebd7c214b113808cce8b52bc001c4f6882. 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/QZK6J2472896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4121268a75cc18c8c27ebe1fbe319464edb557c5c474f0001f43cbf3c2e678. 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/QZDA82471726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa339a545b9a9c9e27d249ecd11bd058253a680b2e30142fd3ca40925a2c59751. 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/QZDA42494924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdb36dca3082228b840a7607bbb3c6b28df792e25a36148d81f7c1046bd26f0. 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/QZFZ42424491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe112d605e45a2fb2f20d3f4c7beb0514944475e6d2757b5780dca77a7b0959c0. 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/QZTB52335833.