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 0x0e947272eae0f30943f388b886608b4b7efc4bfe4405083733b95962aedf3861. 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/679f34dc-c93d-4506-ba3f-c3333a394512.json and https://artists.proofprofile.net/proofs/artist/679f34dc-c93d-4506-ba3f-c3333a394512.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 0xea9ffd5223ae1e9ea9891f8b2a1094b7f8ce5f4d9abecf01032f5d87b39f6c33. 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/SEXGF2499228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25736bf1041d78f616f4e633f0ab5161f052a6cf8397b169832b77eb38984f9. 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/SEXGF2499156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77da65f75f067bea051d914644d71536f360ec8939312e3ba38af50b7da0fce4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEXGF2499093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7118ce4ab295c660bcf99ccf9c98c9a041ef63e5e14edbd2a459b74fc2230d19. 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/SEXGF2399745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1898bede591e94235db4705e46bbb4bf82c8335cbba40d72b3d77be8e9ab5f. 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/SEXGF2399535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a59ab92385a144f7dea1cbeaf7ab238f81cbe4ae331064136cdfd87554a595e. 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/SEXGF2399497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6ed61439e1a6ccedb9c2385adecb83e9fa72c7a2de2f5df596c661e67ebdb0. 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/SEXGF2399424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb8d1fd89e90da43fbe44453c0f17b10abcdf13bc45fc901aad0e2f676cfdd7. 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/SEXGF2399166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f7ea9a2cbc03142d63e6cf47f56d6e20aa53b34cbc383e13d61ecd51f57f1c. 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/SEXGF2399065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c444584653a7c10d712303c611aaf8066470c073c69379ba7d3e74c186bd9c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BR6KL2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9d3b4bec739c1c19c7615824b370cbe2ec64cf2d55e7e199071e4ab81dc86a. 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/SEXGF2203898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973d7405c851c3b91a83fbdbbcd74f00fc77b20c44b7951234b6b6ecaf3660ed. 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/SEXGF2203112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b910c5717476227bd18b7aea71d73eec651881934058792551922e4bb1cb19d. 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/SEXGF2202456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864417309208008973d609c9bfee3415be9cc96e30ef64c9b8d2be3129b2a8d1. 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/SEXGF2201726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974795f82c454490fd8658b1c54dde1c745e18704ce829969cb5b4ebc46d60a7. 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/SEXGF2201406.