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 0xcb36d5194d1cf17d127fb536f25bf5bc5fa7fa06d5c15a142dbaa58ff8224fc5. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/291feab7-4fa8-46a9-ab2d-c97be4bca5c0.json and https://artists.proofprofile.net/proofs/artist/291feab7-4fa8-46a9-ab2d-c97be4bca5c0.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 0xa1758e8e47d5da11c86462b049107e2b9e4554d60aac7fb6b5e429bf26c10f7e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZS632566444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5e6773d7cccf807493054cb88a75b19fe24e6ae4b4a585a4ca24624989ca5f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMER2582477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61de6589f3c354f1fdcf864b3dab710d419bf1fee2feebe1813460e8f7dabb72. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZMER2582478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acbd46b51a61bc058618545c3234830242d2444eebb0c5e9a9606f9604e77b9. 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/QZMER2582479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d6350d07732e2c08cda9a67b5304b096de76e46628a4fc6a134a35de33d0f3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:17:56Z), 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/QZMER2582481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc842f788cb3c094d0b8df0e4c35abb21001c87bb1bbce9733664e814c33d38af. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:33Z), 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/QZMER2582482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc266fa9766ac92f57eb7f76394d79d898f28a133a4a998c96832cafd12f8565. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:36Z), 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/QZMER2582483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd1ccde8d612a7cf57aac02d3e47ee4e95193dda0e67f2ba80dd20892606eb9. 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/QZMER2582485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acf1cbe7b9211124fba860de81dcc1687f28bfd6cd747e94dd1349b3e9fbdad. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZMER2582486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cd17e667c05b4ca343d2bc2816f806a647a428c3ef10311981bc7a923e19b4. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:36Z), 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/QZMER2582487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a43076fe950536b8bf78ddc51cc656d19c19e2ea6639b007243fd36aa943c6. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZMER2582488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2073d617fcada8ae867257ac04a94e021eee60569a77ed5059443a9b21ecaf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:46:49Z), 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/QZMER2582489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c295e2bc4125c8dead583336ae57f53ccdead96d4d85da9c5391615443d498. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:06:16Z), 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/QZMER2582490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687cba550fb7d328fa8f8d799401d0c47b818aae38b05eee689aeec686875876. 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/QZMER2582491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa286e53221cc616ccdab2020a9f670efe801b978ee5afadc30e6c3ff797ee1. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZMER2582492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09802e0b70a53eaa11bde477e4eefd991f4b0209f74983260e44f5728a448c3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:59:28Z), 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/QZMER2582493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd74f515723ce49cf4606c103cc193d264a06c595eaa1bbebc47bf44f9f10fb. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:19:24Z), 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/QZMER2582494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa816d70e953af7673318d70c4311bf7c5b8536bfd4011395a581189e1aef0847. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:28Z), 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/QZMER2582495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b79a9affb63c60272eb50f3745c32b77dbc61d0b10d51ed18ed453549005f46. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:38Z), 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/QZMER2582496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e14fc67881cd54144c137c6af6ae17400e4fae27e31de0a174c61617ca2451. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:34:55Z), 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/QZMER2582497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ddd1c3639e8c82e9a40ed0dd731744cc1eba7eba0ef702cf5fc13242024604. 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/QZMER2582498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9ebb971f87b109fb2e4a659c12834d26f52212afc5705a519727fce9a1bb89. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:19Z), 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/QZTAW2531161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28d39edccec93298c5633c46e6f42f845edd8fb36d76619c937b22d79850cb0. 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/QZTAW2531164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ff53a6e73c55ec3bbcf7559eda0dc82734c441d12cff6b4769c00a459fccfc. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:25:08Z), 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/QZTAW2531165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19d3b2c484fd558078fc8b121b113ace8ed9a22f585864162be165bd9846997. 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/QZTAW2531167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c750b4e328c72eea5e063500f872e6cf6cf7adaeff03487011d278262499c0a. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:23:56Z), 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/QZTAW2531168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf277a190c1d5adf2b19bc12546af3708518736ad38a02b87e30531e920824c77. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:59:57Z), 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/QZTAW2531170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35eca0e31d3563668ab632bb7d0f5f2c71469637ddf0b89efc2728e4afd6562b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAW2531172.