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 0x0f2379e70dd5342680da3b81bf508c8c3a9a7dd7bc1fca5d3524c20afc410871. 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/51f3c42d-9fda-4ba2-9fcc-0ad559c5e83a.json and https://artists.proofprofile.net/proofs/artist/51f3c42d-9fda-4ba2-9fcc-0ad559c5e83a.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 0x387425817cddf3fa121ccb622d2953efe356f401b02e6a0c309bcc4ca6a6903c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEUL11500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbe8089df52b506cb85b7fee38b6ea7b26fa2e78f6aad4f6c939c666f5a72ce. 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/DEUL11500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47259dfaa6e49d7886471f9d4eb198d9883951f42d73f3d01e92b19503495d0b. 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/DEUL11500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13687cb4b0f3cb99a3a9db31491e524801147ec736baeaef91f743a9b772f168. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DEUL11500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39907d09926b4adf4e42fa502d9dda9ded0efa8b83f78c6d53953bcaf82e63c. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DEUL11500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8efc871be48eb585f5ad1219a363bbfbf6ec30d6f0f59c3d7b73385faaf5bc. 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/DEUL11500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fb84f3a12a98fe1f2f3b3999631fa652b4794434253ad2bb44ddd94dcf9297. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEUL11500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d033a083edfa783efae7f8b761803b827af440f8bb254c9390d23f9b432352c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEUL11500128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3d99163aa6691ae31c4313b8d382af1bd878a60175aba1a0e261ae17aa6e4a. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/DEUL11500130.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50580e006aa18334ea008003f695cb3933cad5f333a876fce855c227b27b67f. 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/DEUL11500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b53ef7f1f2878f358ce3f09ce4e9129322aa6b8e289b11345cce25e7f397cf4. 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/DEUL11500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacfd4f99c5ac7bf813e7a8e66d08b7b1e5a5dd34a7edfe1e986e63e2ada1e4a. 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/DEUL11500135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ba94790243877da2d522015329d21b849de10b163d629031928d096f8de8d2. 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/DEUL11500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1002d898a8eb221ab54c7bc7428abeb05c58e091d49582a879a43a4e2c967d9d. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/DEUL11500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1d941186e3355824f840935a3d0d5571c782799b8688207fc21d6e5b1f4be3. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/DEUL11500151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d93460b2a2e0ab837ecc127ee364dce5f6e4b1cc1d62a2f3fee8d44f07a5fa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEUL11500152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888f6ef76c9c9de8cfbf5ca074fa8bd0b8844f7cf69beb8ca2b3f624f9d509fb. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/DEUL11500155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f92f16e3637a7354de8af5046baacd0999e096f80656e7c8acd134b6a47e84. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEUL11500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcb2308f589c7e36956f0a227e37d00c1a245d387f014cf2dca688542b65b6f. 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/DEUL11500185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd50b8b3d729dbefc72eafab61a027441bfce82f83d28f628a914333c5bd0a48. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEUL11500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d345155b81e78012f4a93fa746daa3ffe7b61a3a98a33e1deb608fa737b2f8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEUL11500253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d27bd8886a609743e33914ed764273bc2a5d4d2d87f1bbbf418a9e1180467b. 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/DEUL11500256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cad0aa0c94efc33fd24f06d2dcad155d2dc662b254e6ea9a4de05788a8b3dd3. 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/DEUL11500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61373dfb19f8a953afa62a396f4959016f19fe948709cbe1991962974aeffbe. 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/DEUL11500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af6fa0c06610d46095c88cd69bb3bfc7c629be7e1a964d0e9dfc61404c25811. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEUL11500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a52b1a9f8490a9d2f7a0480b5ebeee884634ba494c1be0a3be1b316ee6d7e2. 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/DEUL11500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7071424a8589a2adedfe0cea827fa1338f1dc6ea652245f672f306c025d189. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DEUL11900757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908bc50c1295511d608d442fc3b329923e1fb3f0d98cfa0ef7205dc0d3679d0d. 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/DEUL11900759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1825ae83a5ff4723f00a909d250544c5df7bef4021cc8f225817673b913124b5. 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/DEW272401723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8da47ad126e4e8773cef80da6ff9210ba4e0f461f7e4205637adf8a1a646f60. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/DEW272401724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997e21c06d1ae3312b99e5553999b24ba13b2d8930e8ef05a72ce66144707ef5. 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/DEW272401725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8503740861eb5610164d5f327e3d42996ea4620a58c109291b1da674de829fce. 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/DEW272401726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4529fec957900bb49d116ae6803c0d95e63917d67e24566a96e02bd732b96103. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEW272401727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e626eddd8185eff28f4f367537cb40acf0c01e68be589dee0a702780b225000. 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/DEW272401732.