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 0x8c0ae35c5a3c2a090597f3d0bb01192069f3f4e24f8af15789aebf55694d83ea. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a6615cd-706b-46ae-948e-211a21ea86a3.json and https://artists.proofprofile.net/proofs/artist/6a6615cd-706b-46ae-948e-211a21ea86a3.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 0xfd21249038595b0fb5eb08bf0f369bcca65d06b99fc2246e7ae08ad577615a5c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CH6541712137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb1cb4f2eb1b986e4e0556bf49f67b6b9686f699d7bd13228876c5f77f96358. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGG2218008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9f61c3561c43c803e3166c943657d07b0da15e794d99e6d50212923d804194. 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/TCAGG2218126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3788943766dc28d1812b42a11e37e3dc5739314ad92229b29fdc6eae3f518f54. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAGG2218147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2692bc59d823ec8ed296c81a3bcaa17b4133ed06b28c6a751f640be398c610ac. 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/TCAGX2312330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc4065260e4dd26d3c0cc1e68bd152279cf5980a7e8ae258502a7fde4dad5a4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:26Z), 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/TCAHK2386346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb189ce16dc12d44251de0622c9913fdcde52d958fbd444f7436c590e84d89d20. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAHR2367411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd014b827baf216ddebeda35c7a3094c8c8e9bb501ee79a43c93ebadaffae0f1. 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/TCAIS2411762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092bf11e841e2ea9dbed1c5443fa9f4133dd4f47d2172409fed15ec5854e5850. 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/TCAIS2412548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9981e12c54738a670ab2b54e9603d985dbab4f1409693d45b6b181ebb878daca. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIS2423852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62568188e974acdf49cf7c226509bab54fe7c5b0c4e004eb74b349796f3ad95c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIU2494427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1814246bc9135efb4a64e3e173e5878701ba916721246bbc9aa436130fec30de. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:44:00Z), 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/TCAJE2590932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d0aefd933af840279e081b99a390d7447f384a1fe8d77642b01859ee274363. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:30:06Z), 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/TCAJE2591099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e23be3b55997de39e75eea297b79bf4660b1be3cfb1b002874d2ee50ec556e9. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAJE2591338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e369e17c8888aa8ff13e271e4d2fb889153017757b5785e0c71b63464d73570. 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/TCAJK2599154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7142213434d1c6c4cca57ddae5a3b6909d65a203651bc0a5f1ae6f5afbd57bbd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJQ2527500.