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 0xb2c1e43b5d6971d76c5bad86d3ba53df7fdfb7cba9cae6bd1ed5a4359b213169. 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/bdff61c4-8af0-45ea-a39e-b2522cec8a93.json and https://artists.proofprofile.net/proofs/artist/bdff61c4-8af0-45ea-a39e-b2522cec8a93.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 0x72a1f151227c7fd5d5ca38e5632ad88b43a8ade408eda22713497ae29d82c523. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GX3Q92029110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929a6ee8a6fb0f0bd16b8a1881ddc86d2af8d25b81c7242e2aa381eed5caed3e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/GX3Q92029119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472d8575190672ae5a82a218ee3c4c739078b4aa416f950ac40511ab7994be99. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GX3Q92028873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17849d43a977acd2c3ce942253aa02e6fcc2b5fedc698a64498bb7c8be62ebb3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GX3Q92023037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e735fc31e07ed262cf55c70da84b1df2acdcb55aae61a47d41227c3320c6bf. 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/GX3Q92197410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb4204ec3a77b08e82bc67ecd594cce7a9a1b46a173bc93a35e15d6198264ac. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/GX53U2021760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67484e667168afdc50d59a3cc46577864383f6eb627d41432b8d31aea31431a2. 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/GX53U2021761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe57ae89b27a098d09b8366ee8f3a41c77c84bdced70bb72d16064ba2bd60e4f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GX53U2021762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f1523629a08eac5e6529ef3639a8e6e49cdc6e1b0b45270b980d1c23f64c0c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GX53U2021763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd3728265e599d992024bea198b0fe934e724ec3968f6302f10474bfd03d681. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX3Q92358540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a9c3f4427af71b05cc7c1df842315f4e40e58dbff66aa8b0b1d16a0e3fc9e8. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/UKXN22367625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944e4f9bacf3c4cfd5fc941b39c8ad86e5664b1ce7615db883e5518e0846bd91. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/UKXN22353317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa052a1cec111ae1130b3c2a6094d127b26398bda7929f679b4345860ae02684e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GBMA22301089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd979a5c1442cd6034864b63602c7f361eb3aec4332d7b6b170806b6db8486b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GBMA22301095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a6a09e6751217679d51662da0a09b32804aae4b47bcff67d9ce706381e21c2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKXN22423667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5f188557c168b98a0e3d8c7ba87c04ba99d89a18ecbf18eb111eef8413ff78. 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/GX53U2415989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610837888d99dcb5f4a4f78a803c2369ed8d6f445eb78b20af131abf943d2fe3. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/GXF9Q2489849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682cabf216deb644e1cf83f33ab4f6f032353b9f704fc651a1f50bd95df7ba05. 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/GXF9Q2489850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca0029c6335f2e935403c6d70900fb0176eac12844cf847418fa9c32c2fed0b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GXF9Q2489851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ca7ba1fd5704cb478665a5d3ed68b5e3609d69d31ed07030439beeb023af7a. 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/GX53U2354648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfc54ac21e09f22c4fca67fe900a94be558205a6df99bf7d826f8edf7d4b7f8. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/GXF9Q2489853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd37d35af83a6bc703cf7d8093c310dbd7e96f76abfa8e3fcc62965666b6f04. 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/GBMA22526033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d9bed8130bf7c38681d96c25db1c72f3cd84760d1655b55829349485614f88. 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/GBMA22526002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd48e289da538f1147f4a9607ea995ddefc7f32f870bcdd7323ad262f92840b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GX53U2505436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c5dd5794d069d23cff8ce2d96c1d5c0684ee39862268566e87ac515515f664. 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/GX53U2582763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe68e7328e59fce5c537a171bf6cd1ab50bef6335447562af5a9c1a22c920173. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GX53U2582764.