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 0xae66eac0cdc057f3de9db80900a4a56e252aed65c8552c5725ea96227ff1bb77. 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/b9cdc28a-add8-4009-8a5d-50be064a30fe.json and https://artists.proofprofile.net/proofs/artist/b9cdc28a-add8-4009-8a5d-50be064a30fe.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 0x04520a3c4e4d0dfd5089c82d7b2595429e4169153f52ed2183a7195a061fe196. 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/QZMHP2483674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a56fb79024f613c09ae48ff6c3298084ba44c4144aba0eaa8dde85511ad8b1. 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/QZMHN2491106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b507d08327480fb0e9c22464e3f10a7e4a9fb74085666804a387c578518560. 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/QZMHP2402589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5609a3e7084b157ca107a0a227657df5f0257c1f825bf5fa3d9727577a0cf0. 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/QM42K2416037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fde0b5fc2947d8ff00e337649e4ccac4b6121caa89b2711b2c0e17bc0b16c5. 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/QZMHN2496523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9454b83d35ee89ecad4a6274e239c698f42e0323ccd3ce7378d77461d839f1f4. 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/QZS672433349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97a50e5f88ee62257c1666b557a2f8260ddb0369ecc281d98b779ecdf6eeb8d. 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/QZMHL2462550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a4d960dbb8a55c08995deb3ba5988629d39bef605c70ecc4eef6c9949c7104. 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/QZMHN2473608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be91f4b94c6cc850ca26b07fd38aed2baa831d5b1fd7e971ef3024ff8b61e45. 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/QZMHM2468134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c82f9e6fd8fd59ef1b92ed5ed9c28cdf974fcb0a1d992fd7e3c6cc5c3384781. 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/QZMHL2454910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac18fae805490834fbd50b1a3a4b034f02b86c9d4bbcc2aa51420a9257c58106. 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/QZMHK2481414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f6c77c929ef7f2694d93ac0a96ad3509c0adf3e2a2031d3da5ed9fc638b18e. 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/QZMHN2487331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426a3f9fe02a7029e01594daf24c66b611c9a67453fe5e7d5a71fd50510e1927. 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/NLCK42417935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f71ef0647d18923e29fdd8d38603e56d92f12989bebe974eb99c3e9dc4fa27d. 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/NLCK42417936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c47c5d67bfd306833fbe6af183ec1619495be32a5d5f0b725619984d9151690. 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/NLCK42417937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605f346caf7b4d74f8dc1196a0e512178b08a8b8384b568da778afe2fa571235. 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/NLCK42417938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2ce43ab7de1559170dde41a0c451771b011e9d271be386ba56e161f2480a95. 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/QZS672467661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38021269103d50ce79e31141bbe548e629447b0aa490a6180cfa93ed50ad0d81. 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/NLCK42422997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b99385674ef0b89a0893bde580a79f09047882c88bdd7f4cd550a36bf7c242d. 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/QMDA62581942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f52a2f45317ac37f5858f78b194e451e8e70ec1c2ef48712c8ebdcebbadc371. 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/NLCK42506692.