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 0x32f268cb10bc7e56d110bbd2e0ecbf9f282ee87946dc886ad9a063c3c658d92c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a81a1a6f-21b2-45fd-b7ec-736665dc3782.json and https://artists.proofprofile.net/proofs/artist/a81a1a6f-21b2-45fd-b7ec-736665dc3782.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 0x4c7c3f4ecd84b25ddc6fb88bb26831404045bdd3a87f03395f1776e089c14f69. 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/USCGJ1212270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ace3ccb9e6d6650361a92e391a40a693ae3d11213ec313357a7e67912e9ffb. 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/USCGJ1212273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3e79dd6ac813a2e8088bcf16fd46cd4079fdd7c706cb560dba5f94e27253c3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USCGJ1212275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818daf27d43c3905e473ddcda0d7be4e8427a9e7342228c0771c6e6dcb3edfca. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGJ1212234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07af6a4fe4c2cb9348d2626f56f70b9fd2bdf4a7b5db2af5789703f3de996e4a. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:28:18Z), 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/USCGJ1212235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3efb754529a00803c05527bfb9a6ca254412d74c3067fcd9541e556cdcb2d1. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USCGJ1212236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be9efdee440c8a2acf08681916fabd463f88b7660113038a1c05043558e50fb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGJ1212239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd89c7754aa766cfbc29e293a3e94ec2224f4a58f85b832a34409cf7f505439. 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/USCGJ1212242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad590d69475166a50e68684b26177a71f4e35e91b7ca8d688ca393d25c3e193a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCGJ1212243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7d70f553ead6268748bdc887476284a16000b7da3593d7b9c094877817b2f5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGJ1212244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519d4290dfd1bde1a97c616d758d1c2dbb2c46b33007f90722d326918c325555. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGJ1212245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe711d37981e385702894f563557fb9b23120eafb03f83255e81f1693e28888c2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USCGJ1212248.