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 0x80aca02dd0220eb588a3f94386c67c31516d855c7bcf55b0a49e7580e95bb2c2. 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/17bec61d-287e-4303-aed6-1beba055f2fb.json and https://artists.proofprofile.net/proofs/artist/17bec61d-287e-4303-aed6-1beba055f2fb.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 0x30437493a37a10d26415fae9ef8d830a79e21835e9f9f0e18c931b5606ab5586. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US8641511901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8dba15c55f4f9878ecf46566218a907be0a92b1e2347a25615bd83c791b04a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US8641511905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e8829b5698ac4fa4f46bf99e753d5ede2bd9b6215bd0527a0ac7c05980a73e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/US8641470601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18df813cea1cb6060a259f1a75c7f61db697291291cacccc6f35fac2c2875fe5. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/US8641470602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ea2b276d50d006bdd14f5a24d0337a0a5a5bce88faa3a9239407446941953d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/US8641470603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2474d3f36f3704e1f57aa8fb39aa144967e796581994c83f03b5113e448d69. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US8641470604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adc82b059a29b8e645fe91bc81dc8833a5b02ea063b65ea9994ccf836f10063. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US8641470605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24592402de250c0747f868c1d0c329ccf12e070d9305692d2423d6aff4cbb2ff. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/US8641470606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c909f25eeb594ca8b31c9babf91ade6e9606c1fdb4ec15ce44fec34c255c2d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/US8641470607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0782fed38a507602d20c0653d00c9229d5be00354fe4f876e158343884dc6ca1. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/US8641470608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb579ef287c76287bee1ae81172e67e5a72ad0f9f309e68c93188159193333b00. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/US8641470609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dc222bdeeb76dbf3e28b14029f7c8b1161692c67d86aba25993656dd20a2ca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US8641470610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844903d2a0193cf5c34b502dc1ce998a86e2de966ac165c7a115e898e9c3c9a6. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/US8641470611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a2aa4bef1d29ff84ebeaa41c72345f9cc89eb60d4321c7d90bd64e0fe44552. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US8641470612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e81775031f506d3159b8e4455dfaf863552ea436849c040c1ae72038b27751. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US8641279401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2e9449121739e69fe7964da96c095428b843ce6bae1cb59e57b3360632bff6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US8641279402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccf8df04e67b51167df5d82a2d6fd4cb02807c63a90d1a80f4beee1c94954e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US8641279403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6e8964f4d33634dbb081c62a8517afe96fe0a9aa833541172020b10c8001ae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US8641279404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6676fa5434297e2e9ad16e93fc8d4b20594356abe4e3a0baee4173974971f1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US8641279405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2a08066c0f28f2747d81d16bc8bc360981a39b3582ea44128f906a047694e8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US8641279406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a44412d0f1d7468ae1cb8be8f9c42f7a371a626d9a2df326c35cb31584fe3f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US8641279407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916a79a9d88b75d673af95a3b5bd20ccb70f044d7f3e6d745da8f5b44b5f8edf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US8641279408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3d677372cb92b63d21d2b31cfcd1ae51c96aba86ed640cf4c64f86df2dc2a7. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/US8641279409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d67ac3f463cd2ab98abdc848981be25de216f6c1de6d04e23ac430cab616ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US8641279410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0300fb428d855dfa67a4eb9a80f13ff64d5a47ff75868d4c849ee97fa9c6b27c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US8641279411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe0892b8ce9563365895ce580ce8f9efcceef1af8f9c215e2889f38a3ffbbc5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US8641279412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa945b72846e7d79216ba41c2cfec450640e97920be3f9c12369295a99e4f2979. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US8641279413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef65ce275ac20cd8b4a205143da0aaa79cb33383e93de3dc590aa0c2bf24dfe1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US8641279414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af05900f4d31cee0ca51ebe01131b80dd45207a3c14526e133529cf593e84c4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US8640979301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ffaca137b940aaadf3a5eeacf9ac2b873339dc45fad814dbca21629ca75008. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/US8640979302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338639a7349d1e643ec904eac76b3bfeda25b9e03bb8644293a39dfde0fff976. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US8640979303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032d0cd5a1dd6fdc8d1bed9e386d89a6e0db7f422281107c93585016814109d5. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/US8640979304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f29b448578c3c95127c9974b9e08bd5562588799675b3121a406ea20ea8ed0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US8640979305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0724f1c591a447e800d56dd36ae615039d577a6ea404f61cacd778c94567988. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/US8640979306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5e1b5721539553f69123c2f5d6c56a5e08b3701d836d4e6286ca830229efbb. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US8640979307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918ba823911eebcc48499537ae6819aa20aff2a0a265f40d170bc902ad42d8a9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US8640979308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78a91d8b5c5b495482cd9001f84c615089b04b97f76ef360e6b0cec7e81ee76. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US8640979309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fd31602fa7fea847e2097b3014b7645442985e1e2a9161866fe8bc23f4551e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US8640979310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0182ff7c37fb381bbfd4e1c86aec45cc0f81e731569c4b03f309391cadce3a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US8640979311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1a9a8b986ece2307f6ffc2bf84a486d50eee24acd92983c672bed76fc770cb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US8640979312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9805d2f367f36b6be422cb715b377c5950fd26d132a11ba0c146c3e1e778ce8e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US8640979313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82264d154ce7269723b5a292fb1dbf5f70f8868a58e7acc442fca1fc0ec0005. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US8640979314.