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 0x07cc5f5d453a2670c703d245cac6f11d03ec0225c8e270415978d1228e2f674b. 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/834f2e1a-6ebc-4dc8-ab97-15c21944132c.json and https://artists.proofprofile.net/proofs/artist/834f2e1a-6ebc-4dc8-ab97-15c21944132c.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 0xb36c7add191e4bd9d67d32cd4a481beecf466392026d4ac8e3e1c3799baac879. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM22140769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d77e49cdeda91ca0a69bbc3b90d339ea15461727553d1f75f196cb7774a9c2. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USHM22140770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a6c5391a5760328666d93001d9b4d368f5b3ae7a7ca7cba0647912b4d449a7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM22140771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa125632a738ae6359bea8614eafc3b14ac2ca02d5bea03da6139b7caa92eefcf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM22140773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7968eeae1441ed316bd640bf011cea771a7d110389ceaaf8f7c1f12521b9ddd3. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:25:32Z), 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/USHM22140774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3834fac607586ffc3612d78cd84a5507b52bb3e4526ae02fb995ad96b0bd6490. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM22140776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772a55a9bf2ef2cd828c12b9119ef50b4ad85e6c0b48f5c8cd730c16c55132b0. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:39:54Z), 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/USHM22140777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cca67673284b1b2093754177994cdcc963d2ec40ac6d3865419ea4f1e0637ae. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM22140778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d3c294cbdf4c61fd5cd6ec1add286cb61b17facda8e5e88e5353ee245ef731. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM22140779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb149b52f7d6805154450da1293589c6be7edc1fd81bd56fc9e82e56508ffba5b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM22140780.