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 0xd3600863c92efc3fcca527327ebc87281df975811272d9afd8a7b3aeb93c3733. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a328908b-b77f-441e-b954-66e442e73214.json and https://artists.proofprofile.net/proofs/artist/a328908b-b77f-441e-b954-66e442e73214.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 0x7d899c41973413b5a497341da8ce05d22a088ef7a699612dc45f1d8ec6ec38b2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ22507573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42cae104c009d17dd401f826a5fd8d6511a6ab6e849a3dba6b31e29525b4e8b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFZ22507574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034c2857007a2a7b7e87381947b75389c192f4951158eb3c5839d9a82b723ccd. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZFZ22507575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780f4ff87bad73dab3460b9dcda57083bd107240d2f6d311f2705b6ca0ea0a8f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZFZ22507576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf076c848db214b050273a129f4a39761d700993da1a01802a047d78007ad5316. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ22507577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb35ef23eaca22c72d97c66d4d397d4007ee72512dbb4022013e7439638811b5. 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/QZFZ62514568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff67c10cdc7fe2c1f3179d520d495ea81fd3bc255fb485e6958540c74ba74a78. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ62514569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af3cfb175401423052082f5a4e8e5c948520da223d8ccb50c46179c2e4f3005. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZFZ62514570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac135ab537475aadc9679cc2acb7eb81f4ea5a374c70175273ea2e9baca5844d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZFZ62514571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe258fba6bc35513246a085b4607822d17788ad7491c8a3e9a12b3826c837b33e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFZ62514572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae37005fce1c18bb750587c3d8b12aabed40b27a378ac03329eb741b98b968f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZDA62580393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff8999f08b4814f4493fedcd185f9d3674764631b074a67ea852df7a2b2fc24. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZDA62580394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0050c2ec62b30f6ab9efa3b342e6d2b613a43c1a118f3762e4ffae0973267bc8. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZDA62580395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb58b72ca4d260102b450253a75156c491268fe8a223aa013862fd8577fe75a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZDA62580396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d828758f36a2f148a84df8f8b722a92c35c6eeece2a29acee3acf8b8b83663. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZDA62580397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb0373cd19f5298ea973d86281c016c468c2776bdec15f27d7ac33f113c11d3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES62518016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4f45bab8dec7ae49d0780782b8c393a289308f537f5ef938d173c4293a42bd. 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/QZES62518017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5a0396c45721da3470e0a0be1a7627f4ff1981bfdc7730fab7140c856e0c57. 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/QZES62518018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00320215db849506d6676b16c307206571178b58571482287806ec3719d31ef2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:34:54Z), 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/QZES62518019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8a92755a1916c9ce65d2a173177770201588f0cf8c69c98cf3af7054c1220f. 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/QZES62518020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c07037f545e0ca8df726500635b0de37e5b41b7dcbef8cf8a59e66e5b4dabca. 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/QZHN32589309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533460e9e1da091cac73343d24684dce48822cdbc3ef0e9c4e861eaf9bfac6a5. 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/QZHN32589310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6171a82dcd4d69ca6be1d131216a535dc5a7ebbd3c220232c9d23998720cd5b8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN32589311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba2ae34277160067fe906742dd45590ad828f6279ae39f6d66e5e7fe39b5d71. 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/QZHN32589312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec03940c09287ba4739372bafe7055cd22a87a3bcbb06f59f80b24ad578c5940. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN32589313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d4af19abf3e80c0a2e31d4aae0f6bff80aa00278ab5ce8c2c69d011305bc58. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:42:57Z), 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/QZHN72551599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd706e17ee33c1bf47dc83a92f3e9164896d8938f7cdcab2808a33f717a3a261e. 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/QZHN72551600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bd615b9e1ff0965d87c6e685523166e5da1596e6a44ac1e57295c0cfc6cce0. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHN72551601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdec8e6e43d1224709486ba04c2dddb4b0523feaf12c8c03d2d200321940df0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN72551602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd231fb024c7c7a8ade11e7eb88536fcefb2d783b3cede7850c3236cb26ba83a. 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/QZHN72551603.