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 0xca68555fb89ddf60a4a3edec802a83258883cdda2a927fafcbb34e84bb06ffed. 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/fc8651b0-20fd-431d-9054-f9f1743f49c2.json and https://artists.proofprofile.net/proofs/artist/fc8651b0-20fd-431d-9054-f9f1743f49c2.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 0x7dfb542cf3816df5fd51185551a60496fc80347a5d76704da1e929b4e0e4d496. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAFA2030554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4061fda6f37b4fa5bb3048a343ad64e0b4ac8fc1d6ba9d8e7bedc73e278bde57. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:39:15Z), 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/TCAFA2030564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4094617e9af68ffef757b2fcf805804717ce0d6e928f9ab504ba1f4f8feb19d2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAFA2030573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cb6ef15122caf128d5919d7540c1c86f2c626ff8b75074ad4a006595fd9f84. 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/TCAFA2030576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3af36936d23f40221259346b354514842168f2a91241b2a680a19acd0d4ef0. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAFA2030580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c97b780fefd59c9b1fc7488aeef95b04e984903b8565820183dcadf48c4c56. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWQ2137984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44eb264be47b6140681ec3ec70a46e25f5a0e992aa4a77a7093ba7b9ca69cf0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:10:25Z), 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/TCADB1718815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4ae5b6ff2dcf3f581981e255644f1e8287834f67f907b60681cc3bcc0519b6. 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/TCADB1718862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c00e7d06bce030fd726e98b49cc8eda198386696fc8ed12347f8471c8899faa. 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/TCADB1718865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44b4938bbf24bc52b45a1ef1dccbb97fb0c38f9327580aa462878b4a4d459fd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWQ2133545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d0b67eb58246d69cd3946ebed18ba5acb0e9dbf3e85bfe43bd6e53d5a2f011. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:33:24Z), 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/QZNWQ2133546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf41e6baa26ff3978e0d3ffebb6c530ee371e0e07ff361e060e4fb9f046bcc74. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USDY41738947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef390edfb6bb9274536cc06cb8df88f964b010b1e3e7c926ddf4800eecda1183. 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/USDY41738949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cbde14efe6b3ed6fe6bafdbafd01a189cf70975c8a80d5a3525236cdab0ad3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USDY41738951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5260c9043075e3c11295e32eca4b63d6019ad6d05a52cd10928f4f7b0526ee. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:58Z), 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/USDY41738953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776274422f90be412b7caebf53c7075047eafaec0408f064b1c7039341e620af. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:36Z), 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/USDY41738954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fcbc35b9a1073b41dc792e3c78bc6c92eece5c6ec39f4196fd3c4e9839a643. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZMER2170928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91f8ed0670ffbd484ec4b385b4c484dd55baf0f6990ac341ef4048642ce9baf. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZMER2170930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff02a990a61df0253e153c9a0ccd29282b5f84a1ff5b39e5288832a84f1462d. 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/QZMER2170934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6d3b0cbab3189a2fae9764771dd256546dabfa61cc574266950501acb09298. 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/QZMER2170937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d02358a0482962bf52692b596cf1b8908379ccba3f0c7be106de78719f321d5. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZMEP2176537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f39dd6ab58fb2f7438b53ed509d72d925aa4b735ef0ee1135b03246f3a988da. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:57:14Z), 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/QZRP42164300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5d2727691672f79cf8d011c02dd407b272b876f32dd6dc30b6fdf2d0384591. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZES52313993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a05066deb7ef0f3421870c9575bec53aa1a0c57c03c88b4961126f667d33dc. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNWX2159003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f475837928c8da95df8f5dfe7a1d6e5fd94dbbd69fec88c00f89ae7dcc96b96. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWU2184942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b85e8dd4bc61088dd42961223856f157d2b9604e8eaa4744522784e823ab3d3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:01:13Z), 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/QZES52313994.