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 0xff70ad2d7706eff3c72448863a5b23ed3af82110c8844e4a85e78e107f58b5b0. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13f5b2df-32d4-4807-a33a-486e7e4868af.json and https://artists.proofprofile.net/proofs/artist/13f5b2df-32d4-4807-a33a-486e7e4868af.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 0xf80b3140f46a4d32a75494144da6dd1dd30cbb03d280119dcba388d35ae5296f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:57:51Z), 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/CACWV2478140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66f9b245ed7da30c5439193fabd3576bd8ec0110262e2269272e3c6043900ad. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CACWV2478144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6ef225dd85a990a153a5abce96962f9784ad147f242dc8ec5851ba83a60a34. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:53:19Z), 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/CACWV2478142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115c470462cae92832eb3e34eb007182cb99396a0e3dc2ab4443834486959783. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CACWV2478150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce976548d0cb72b11d3cc2c3671f4f063712d91214fd65f377104686bc120d1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CACWV2478212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf6e3801f1f8c1296df086d77d6195bf160d4aaa0551b3fa562a6bb339c382d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CACWV2478146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb749b656fea30470a1aa0fa9a51b41fe51ec61e6b97d31bfe729967f405ec891. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:18:29Z), 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/CACWV2478149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8619803ea52d655d2a5d1e195daabfa3f4b565df31cc2bb101b2a4df3104fa12. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CACWV2478148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d27e0dbf3013e504ee1ac16190b0694fc7aa92d165ce498796c8cb6da6b4bd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CACWV2499587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb426d110ed56ebecab859dcff83abc7ed9b6ee4ca62955c30c067b5c7fc35242. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CBEYJ2403239.