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 0xc1d4c2a5071d44420aa1d65a6ffdc58c7d62499a5224164365de353c3878feea. 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/fba976d7-6f05-4d41-bfaf-4e06d0dcc05d.json and https://artists.proofprofile.net/proofs/artist/fba976d7-6f05-4d41-bfaf-4e06d0dcc05d.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 0x257d72b6399f787be2bc3354e55e9bc789613c3bfebc1b96eb313800ab9be872. 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/USDHM2116812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0844b693a18cf4c827e75593a8e4301902006360295a73fc9690c3bf9c3eb03f. 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/USDHM2116813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18981706572ca364eedc617fdd98016d35c54cefa87d354ed6bf078008b4b20d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USDHM2116814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c7b8fb97dbf75a979872ed8812c9e17981fc8f1bfcf6e03a1288872278f77f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USDHM2116815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9f1648ba4b213c1801d6700209a0c35fc4e58379ac36291352ddf026a6e054. 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/USDHM2116816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22789f20742d4f42d6cc6ccdc0f06ebb70e0584f89ea8653f91933e2cddc9350. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USDHM2116817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeadea4161d540e61bb2ced5892afdb5a6f11f2904320aa1b17cad9a959c531e. 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/USDHM2116818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6c964c1d729775f15b2ea698f604aaffd8b8429605366476f34ba8e49b84c2. 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/USDHM2116819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7aed940e3e3d798ce58bb9b02ecf3cede2d5d861e950b6c111927c52c2f20d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDHM2116820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9daebd59897e12e6ecc57c1959e96362cd12a500acc2ddd621ebfb9ed1b808. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USDHM2116821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ec0a5eccdb6ade02fd183c1158bf59d6837b01f09983acf89f284cca359751. 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/USDHM2116822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350010aaac0acdbe741d124954280e48d683eb947ecd83fd7c0c7483a26bfc8c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USDHM2116823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc69bfee97c12df9cd2a7f3d87723fd66e908b76d993e4eb5501798c0d9cb34. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USDHM2203814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b733610bac70c7001e5ebad2a0497ae23e06b98d5794d64dd28e37ce4c8f77. 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/USDHM2203816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa932f9ab7bb03b77dea490a8cdaa9d4e67e1f8fd1b8a5227d7ed1ef5ac22cf. 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/USDHM2203818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401f62a3f02d875a06828575a97692ea27bc6d8b8cab448852ded61a47a0ff63. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USDHM2203819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49423bb94110a2efbbaecc3a9a56683a135dea8e62078138357b9e3b4f80f9cf. 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/USDHM2203820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc827e95d3ad438633dc17f40c1eba00f81afbf910be637f2eb31c08b67a9216f. 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/USDHM2203821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5c6ab4235e12a3769e06d7daf248355f734b4922630385f195634008952c9f. 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/USDHM2203822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c581e4cd49b748905984abc9a43149c533df542d6b5002844b67a79e2f97e07. 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/USDHM2203823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba00ed248e433d93adb7ab151caae905479ae7d47276cfb77fda076a859ebd7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USDHM2203824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffa5837ba889318dbf207e438c8ac3433f5e4647f7def605c21d35b8fe63818. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USDHM2203825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd143bca72d04ca4dff49ca3613e565855df2af8cfcdbeb1fc1b49bceb1cdb993. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USDHM2203826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586863c2a9831854164c7067b92d091dce351a0aac185145df7ec1f2fc3e2fd8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USDHM2203827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d3f48e877de5b92764d9c9a96aeaa9d7fea58533ecaf659d7c632ad67bfda1. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USDHM2203828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ece5d9f5d9bca0d1352ca8956a02eda51065f959c8c0c71aac611022b7dff1. 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/USDHM2203829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2b8c272565cd44047f3e29de48454f18cc3de24777dbdcd682cd6d3ef78be6. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USDHM2203830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4802a448bb8d9d45b57b774956546b7cab8a9043d32cd47e5eaeda2da5e23f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USDHM2203831.