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 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 0x46c93670451c5e2659cb99f3ea6050561ff05bcf3a895bea7b00ff6a13821e61. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75c0a683-9aca-42f7-879a-4212231de1be.json and https://artists.proofprofile.net/proofs/artist/75c0a683-9aca-42f7-879a-4212231de1be.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 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 0x6a15b732ecf2d8295ca5a072efbc3b00f9ab72f18805eb37c00633badb81536e. 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/USSM12210024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e4c1056de4ea6fa88c24ff98bef53f67de866057932a1fe4f69536288fd3db. 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/USSM12208224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64651b5a72f6d18fe51b352266314e21d5d01949eeae3080d5b4c94deccf4d82. 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/USSM12209947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0aa9c19f49201924c626aa7967164cb15a338b7f9f5c39e98d8b0d33580b7c5. 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/USSM12210025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0812b8b2b5151352ee713a4798b4bfb36f2eaab42bc1487e76f571adf2b692e8. 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/USSM12210026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdc922940296315f10dc968530b64fddc2a47e6fef7afff6c24799cc4aac859. 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/USSM12209951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe8e13c8f47793354c3eb4530fb4b76155b6f9944bd35af3869d1c756c3f4c9. 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/USSM12210027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf9a6e44f24e894ab6630742c55a467386ca43722cfa3606551433ea99c84da. 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/USSM12210028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a49a150530b0048439f57f1f898430e882ce8fc2f0e16b633a3da0ea28d938d. 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/USSM12210029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f2ccf3d0da5b7186c0026b8e61749232d6b83324d0ff033178946a8be889b3. 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/USSM12210030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6ad455f290037829138a20fb19f0ff9135c9bc2a667777517a0e12cea7b4ef. 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/USSM12210031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd306b99446d3eab665f8d28d040b66b2a9d9ca416444d8d83f5f771c89f92e93. 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/QZDA82170457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6333d1a3fa135996a655d2dde201a7cf1aeea5410579ec7854178199cfa41cdd. 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/USSM12206049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3be4fd2f0ec49117e4ef9219fddf57f082933dc81fe4159b1f2424a40de02bf. 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/USSM12206050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262555751a213346b2aeb6b8eb2a2bb6aedbe0535f52e6f4c65af51383849e78. 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/USSM12206051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76a45c47e84981563a43213626387ede81aaf161477226daf2b2f7d5040d1b0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USSM12206052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd306b99446d3eab665f8d28d040b66b2a9d9ca416444d8d83f5f771c89f92e93. 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/QZDA82170457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb042f8085f3a9a4349c9c251e20451072e68f41120d1d2368da82274a179a5eb. 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/USSM12306006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6ffdbb2a373941e781d478552662edd1b058748c7263848f4a85e3850c9eaa. 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/USSM12306005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96fd17b2a33bd27c8a142cbee42e8846abd6cc8cdba34c87231bd116c4e564f. 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/USSM12306004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdc922940296315f10dc968530b64fddc2a47e6fef7afff6c24799cc4aac859. 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/USSM12209951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64651b5a72f6d18fe51b352266314e21d5d01949eeae3080d5b4c94deccf4d82. 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/USSM12209947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c7d052f873c591da6e5ba77b9d85e4a5613978addecab0ff47ec6880e6c78e. 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/TCAFT2114437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c95e7d780680c25c8a6b4bac376fc57388a7372957783a231fce99a212ce91. 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/QZHN32033030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f2d56cac4ff27fec9d6a470b011ef4214ade10eef0c3830485b9f528165ece. 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/QZHN32033031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf716fce7cbea40a5d196c37a35edc555b308c2e665cb8b88d4b30d86cb30a33a. 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/QZHN32033032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a7078a3fdd1d49bd3272925cc0ac540f30a90c3e3c9293f91f53a8ed68f7d6. 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/QZHN32033033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b248082c6b40add6d0b2f7c59dea607ab4be660dd4a8d6e624575dab72ecab. 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/QZHN32033034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65814b2b016f62db52fbb8babe088c2f3413ec1822b61d5a902004abe0a2e66e. 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/QZHN32033035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08c337e5e48bb1ec1aca5aaa08b838ff2d826c611c9a6f38caeaa4d9f7b16e7. 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/USSM12309180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927212512e7e5598783d53d5538873744f7d019e4c8042d1b4e4282e4b6f3d7b. 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/USSM12403488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc227ef8282b502a63f5954894fa6f6fbe8061fdc93657b46272b5be19234da82. 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/USSM12102195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd045a4b049c53b48b5a492cff56b695ccc047a0b6b39b0646be4297fb8e7e9c2. 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/USRC12102287.