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 0x4a6ad6fa70a4cc690d41669439d7f3c5f39f69f4d14901b95303544b7d66f3db. Chain 2 (Bitcoin): anchored in block 953985 (2026-06-16T18:03:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d5408ef-9587-4683-8c8e-ef76376bd237.json and https://artists.proofprofile.net/proofs/artist/2d5408ef-9587-4683-8c8e-ef76376bd237.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 0x7dd1ddc45fe691817bc14d1adca163a83a88b0555d346a3585c74169e54ad67a. 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/DGA0P2354136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50178f61ac483be3ac51b456f7c341104a97ee694c2106cf2e2ad933b7181f4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA0P2354138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0947e496c106de51d965e4f1e4b592efddf5be8813576e7d321ad4a6e606f561. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DGA0P2354135.
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 0xbf3c362ae145bf53a244b29c1217a9b2d3718fe0baa86168607ced379d9f10d1. 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/IDA141801761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3743a115e7ce204e29b17d4d822ba95a85e50b8d7100dfe969c83779c0c49d36. 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/QZDA72407485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a59f1e61b947e30e8e27317b5ddf014723400f7316ee179e11dbb9789e4e47. 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/QZDA72407486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84453048aa6b005617263b0bd69c86c373a20bfbf004b08cab711aaeb061ba32. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA72407487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb128daf9f19005c3e3f9155a9a44601eb57f6d31fd0d26c12664bf0c4bfe5c. 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/QZDA72407488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a19085d4eb86ae5e308f94cc0d7f91f2c4865bda24297562a2435ceada9729. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA72407489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38a28bb2fcffa24385c749ce3ec363e881bb93f97d167adba860db75e2479ff. 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/QZDA72407490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a1c85fe5fa0e28bf103d3f1b1de735d37b3c0e7892b294e954829aa3ee3e7d. 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/QZDA72407491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508b118b35217dfa18c5eb8d4afff15db24a7334cd3ff3ca19f979f4a8378759. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA72407492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975fc2d4b83c1de5091e913d97b5ec67379264d47c921dcaced9427b3ec5fb5b. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZDA72407494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0631a5a22ae6ceb27b44ff6d5bf8a6f2e5fc0c4832c2153213ead3bd1ad43fcb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA72407496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c3edf01075006810401c702577fcf00bc0fe186ff13350c00bed124ac46c63. 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/QZDA72407497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f02708b265e883856b09a6c40cc164aa6c8562b6abcdb01906f566aa622bb1d. 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/QZDA72407498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fe914800995c732623f95fde891a57010b75ceb038a544efc9fb9831cad761. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZDA72407499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bcde933926017c4a24eee2427b1fc0842b640e3644866580fe4044fb418667. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:00:34Z), 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/QZDA72407493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812d871c8ed27a98aac655a77749662e6c114cf4cf1e0291f22051dd39af7d51. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2333378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc93befe4e852cc1f87bd0b71da27f4db0d1252f9bdb729c006debb13910395. 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/USA2P2334152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4771aa90200b8a230fdc99d83ebbde7ae68dcd807b6ccbde2dcd5eccdbd0016c. 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/USA2P2335553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52908dc44cd4f029cdc99ae243e9e3222a42281c7c64a99a10ce5404eda64ab. 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/USA2P2335554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5c215475b833f734b00f1d3b53aa6099373ebd7fd833a5aa74dacbd102ef60. 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/USA2P2335555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ad880f006e588f3e1fdb72ca3ce5291c0471e018b2ac7bbc71b6d98b204a9b. 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/USA2P2334150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5abac6ef2685881a395ad75ed7646d1ae00cabed171638ee2f1c022aaadf99. 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/USA2P2335558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33ab4aed1b514dd57ed36cd682de1f619567a9d81bf1de0129cda7dcebc3de4. 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/USA2P2335559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f59e26e43e88a39ec31131cd8d20cf55b55cb88dcea92758031e0f864af12f. 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/USA2P2335560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a66c1879b7a38f2a8ee860a631e2eedadf1f26c718fbd23449feed4f484a52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2335562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcf57fa32a8e078f72c208b094181714139dee0d960cb6a8ef423bbcd728284. 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/FRX762281423.