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 0x9e072a4ea54e9fa041e78ca99c42145b4dd1e0c5c3443544eb2c40b9dc711cc1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbc7864a-abbf-4260-8c8a-409036835f80.json and https://artists.proofprofile.net/proofs/artist/cbc7864a-abbf-4260-8c8a-409036835f80.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 0xdc9ad4bc6ce30a48840be2f1a11626f6ec5b0642c71ebd9746100661a87be4fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732464938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8017743b61a470142d408fed4af6e7cad39be7e4ef78d20a87dfad111e6559c6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKC372464976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c14333f6f7f2edfc585de5d2cb2bb5c2e0e9126eaf79d553f89661e29325de. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732426750.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2ea639949915b0b3faf0f9fdc5974eba1d3b8ea1ea931b89251de36ba4dbeb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG731672545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f316eae995b2a926a1cc8eb74ef72c426c36fa4fea93c7c5d8068e93c86798c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG731672540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e21103a792c3124fc048a7bfaef8a7c3f5acf493c8f59c13c246c322c541a2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG731672541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d67da08f4fe3f0edb2dc14f57f353aee4a076ae2c21decb749596baad5d088e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG731672542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f1aff29896093cea1144efdceddcf3dd1e656042949b2c5859182b171190d3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG731672543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3c5a20e642f1cf1d3bb565c43168af56f172f22af448c8813277d09c031064. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG731672544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5a85b146a9ba7851e56e2557f130bc3f2524b303328b01e1a12f7645cce7e0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG731664779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46838b44d0440e82e6270453210d6d60625e969185b35c519b94c392bfcc9270. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG731642778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2992292b74f2d0e32ffbe4aac48bc88ccce57f2d25f473d6235e4f925e0da7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG731645853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92994e92e428cdda104cb53dfc01b05e4a328e41dab18bfbc0fe1d514d51ed35. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG731611373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19808cd83eaf57ad6b97f9c24397ff4f80c6a06caca82d5a67cc36a7d5a2dae9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG731606156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb6a280bd9554529b1609b91488cb9fef231bd0b55d6a11808a77be6ae9bcae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732385191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec32af629c42c52ac18db50b7797ae196779b50e2daf6e883a5407be6538851. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732376411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7c0ffb8fe6154a47586e0acebd84b215c7bfa3093c4c50faa36a9865096fcd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732386248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73364634e66029c3177e29396714c4366fe0701e24af9a696877dd349504607b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG731684904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca98acaa45d96101a0005128d6fc4eaa316d56f4fd3b4b1677e3f9eedbfdb51. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKG731684905.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640388736a987f1adda5b6b2753a41ec686eef09623a886bf11c46beec924d19. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732356601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eace3500353f83b0eb0dba9c3667ed34fa1d2ca8982e709abd760521386b398. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG732382870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca13ca360d5adc1fd30464214c0c7882271ecd062df5a8b42c9964b6597f8c0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732327511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037ccd2d40c2361b59829d09ff709039d6c1b6ffad129b1affdee2619b515ca1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEPI82301121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0587587d58224994cfffa7d24a7ef9f766f17ffccfeea614f7d97600c3423618. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732301572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b60013b3c88e0f27e293b8e01a848344a920edf4261fda05207ef3fabe17c10. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732296759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0261c72b2d3a11017e617ad82c5958eb25ac96500b41b8a964fb69cea4c78636. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG731600177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46823d2f4d7fd358dae954143175cd58ee085efd6526ca14c2935d6d841ab08c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKG731600178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77defbccff29426620663fb167863b3583d8a9e6a31408b178ddf9d28c50af3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732285869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd511a68ebaf6e08d5acf1d70877f38a90632acbd67fbcd4d63de49739d49f1a2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732283554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0fda4e5e28a169af6b2afdcb13db1c2f327d048747258cba1f2bf33628cc13. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732341149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf535a83a28a07876e3658edcd9d97a74e0a0eac46578d607cacc5de3d7d88a1f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX452241595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d470b8c40330f66d87de3ac08d91b8c15291317303bd577b09da8b2d4148a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX452210360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e49557ba190ce7320e978bbf106ef7b4c15c217ac585d92ff4fd9e1f5bf2879. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX282224112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c87d7078d90a7e1f0965a6985776c00b99d7bc200c8f75329fb39212199c96d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG731601351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e9cd04daa2b5ae3b8650b8d915e1d66b8598366f7b7b95e7b18ad91786be3f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS642252355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5909b87139d453137de807161db1ba1fb35066f379b24aed2e61c248aa99fca. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR59R2216615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c51d98435fcd4dfd36b5aa1412f9cbdf220cb81f3650b89f065a11a08dbd10. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR10S2298283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e55e34663ecd35823a8d0e946a5b25e69c6ced07098b6d6a40cfa68a8e16864. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG731713382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065589ded29e8ea14b8781577b970a92037709b3e577b5ae3c310762edcd0bff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG731857946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf304163e3efe84d7cf2eaa140a067dcecb58c1de46ecd740c15f258b6cc7d650. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRS182133866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1567ca69a88df4e5cca8e997cd75b01296e0d85578c8c65f9018146385419b27. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX872122446.