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 0x0660d8ebb1659927ca874030c7adc4a8d86aad29fdbcfc7e1fee72dd0160549f. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e700b1a-10ca-4c08-bb91-166566887c35.json and https://artists.proofprofile.net/proofs/artist/3e700b1a-10ca-4c08-bb91-166566887c35.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 0x7edda9df24c93b0a388fb1a7cdfecf01b2f701d2ebab638b01a7fdbba9d9e349. 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/NL5UZ2409676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1a42ec71323c86055eb620070c0106ce14ac6d25148b52904a551559254e3b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:34:59Z), 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/NL5UZ2409682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edda9df24c93b0a388fb1a7cdfecf01b2f701d2ebab638b01a7fdbba9d9e349. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL5UZ2409676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e97ae044d9199cb0c601cb980b5d4573e32afd9579659a08166476f12787fdb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL5UZ2409678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1a42ec71323c86055eb620070c0106ce14ac6d25148b52904a551559254e3b. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/NL5UZ2409682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2333ada644ef1d530a3809d0b9e63aafc338565ebbde65a59715e4c10fb46075. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL5UZ2409684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf1d10965911c3a3158c6f524e60e1b9cd474bb5dc9121a498cead458299b20. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NL5UZ2409686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b0bb6c1600df5b91ff8f3c182a0c67ce7f63ebbdfc5cbedd3e0b378a5c6700. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/NL5UZ2411411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654383a44a99f962d5e902c91e49a996ab8e5934326d67e878c0ad15495988c5. 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/NL5UZ2411413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca31e4f3b4caeee443bce3f5fe8c83c95c6c3af7ef3f4255b5cfc58a156f1ac7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NL5UZ2411415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcabd46496cada3ab60e1204acdf5eb9ee9ddff987062b3f642a689a531edac. 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/NL5UZ2411420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c84596dd179d34202732f59afe35ee5688ae28489b4f0ea4c2db5fd20e93dc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBA2561301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7791d343e6e5254e65cb7f6b77d36f6bb92a8a2744405f6bdc95c407c5b46ca3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:51:06Z), 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/GXH2J2547138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd02ec55fe929865d841f1399c54a396b8f01b583fc4d56274de41d8cc298f5e. 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/GXH2J2555417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948c1cd4bc05aa4ddf490d322d481368ff079508ad16997b4defe04430859e13. 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/QZZ7N2539904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9683ca6c1d21f7f0923680a9a2765af1d2743c33a08fe973d7db57547685dee. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZZ7T2533570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da0dc9d4b227c3f5aa5584135fcea68a8d0111c2b6aa5f24efa515ee5d0a8f7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:20Z), 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/QZZ7U2559215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6051c9fd7cdd1f2d8e63be8b5ad2209a75fd47bfb97d97e21b57fbb018aa3f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:16:38Z), 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/QZZ7U2583274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d6304f000b7e3975e4ed42713248b2b9bebff67e3309613d26753ebdebdd90. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ7V2538242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4d248f93934685ddc700a49c6d7bb3b9a8df1bcfea7514b62b7257ee8be5b2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GXHND2563143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba793275bf1f6779ce0795c0e1cfe79fb3915f93b0141428c61e3dadddd4b7f6. 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/QZZ7X2581729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331d3f4cb03a1753b14540b52d9de4f2a74aa705feb5d566b40ff057a6d2947c. 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/QT3EX2536785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8762c9706b40232507a96fafe02fffe1ddf9f3f4b31f9692396f37a2eea61d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX53U2602779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2502d2313b1668cc4d57b4ea6f650fed858111969f550379142f2e559d4accc. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:15Z), 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/GX53U2602780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7384d7d1630df3b7275607e2732c92942380f4ce6b1ec2b385787b7218cf762. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3F72598162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407323b5dce413a50375b3ad85e9c23ac304cea08a89ca2bd8748252c2aa1c7b. 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/QT3F82524028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6880c9b8a97b5963ed84139e853b970b5688ad81e91fadc527b35cac6f3071. 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/GX53U2681811.