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 0x602e1d48011bd01caa736d560f8d9a74979fbe98bde3967144646d299f28ab68. 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/f518ddd6-8261-435b-ae48-9dd2e4e56d68.json and https://artists.proofprofile.net/proofs/artist/f518ddd6-8261-435b-ae48-9dd2e4e56d68.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 0xf3e59edb19abb279b37432f1cca05b33f54bf17464bac75911e4581cbd9f5bb4. 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/USUL10200487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1050bf622ce9a072949e16e5e726469d8d67cdaa135d741abe74fe502a606e. 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/USUL10200488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a35df842b02ecfa649c3fadd4a6a7768267d18163844890834c1df40d5bcda2. 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/USUL10200499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8e14781d4bc09d50d652de23f30faf3ad15ef2858284b6cbcbca4325dbd154. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USUL10200500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0df76b59598c9f703ba38e3907955f5b523e58ec3c669d9b5edb512ee86895. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USUL10200503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6208715bf50dc39f58ad5e3f262547f55210245031ec40a9da41dfd288f5689c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:25:21Z), 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/USUL10200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d491d515285de679e6e5a0b20062957917b9d2e3b56e9ce9c1274e75727a6f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:04:48Z), 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/USUL10200493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63e04c3b00e6e220f037618a5701c76eed1e2f9e799824ba6e2021ace93a242. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USUL10200498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6208715bf50dc39f58ad5e3f262547f55210245031ec40a9da41dfd288f5689c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:07:30Z), 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/USUL10200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae6094ab1f443d2f9e0013fb36de3132f5528cfc6c29ddc26e5fa87a179321a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:46:52Z), 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/USV291489403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e55aececeb64607a7bd1608842949ba480b79c143c02c9c243ca89b4f8487a7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:50Z), 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/USV291489404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee533ccf68d5b45c7abf04d5397c0dbae943cbb5b27c57f5ebd095c795a5db11. 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/USV291489406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5654f512cd5bf601fefec9a4c6a0019a62a0d1d1aea15ed14fce3ccca4b897a9. 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/USV291489408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2040f57dec9333e68b1e8278612174980445dd98f41fc7a41a0b61ea06a96f0. 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/USV291489409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb038bbf6224e9d98dbeaf30f8e0939e1c892cb0dd10afdfe6efb9102c10b30b7. 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/USV291489411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969d51613dcdab2ac27ab06aa3a5979a3f2fac55621d31beb790510e39ddf287. 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/USV291489412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72304ce8e47bc29b731595d0e5ecf477e92b8bf101491978f348911bf78b51a8. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/USUM71503010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46cae7662b70779d2757ee6d4424a4c611063647d82ff1a2b954935985746b5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:26Z), 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/USUM71503809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75a5f0317729e68717c45583d4ce6da8b576591c4d804710ec208e914467a7d. 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/USPR39982053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc29ced154c6f0619830ee491cf29d2dbad5ef1ec17f4abb2dd6ca7f00856fa1. 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/TCADU1878043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4c1c7c135262ab6c1892751700d7c83bb73b4f4d5a5956fc9b840386658b2f. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/TCAJE2578142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b621b75ba045df2377f53025b06e588db460ee89a49e2d1bd4859c314cbb34. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJF2542694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e844ef4b14a2825e0b9efdecc6ee59e82c25b193972e36aa622eab1a4b5e28. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:16Z), 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/TCAJG2508238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4654f372bc62138c90018e9cc61cce35ee66a028f9cd1722b56ee3619f6341. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAJP2519679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1aa78e87400c5568a99a53482b4072670fe2262e99a2f5adc2f1516597d8e00. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:22:11Z), 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/TCAJQ2519774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8900fdb7999170e0352c2805be66088e30a7d7c5e45293ab830fd1894a8f7d1d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJP2519733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0113dc8731268a81340e56d19fe28f295878a45daf3f5bb067f48a9e07ff7d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAJA2443204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3e454e35c0c19e4b9a7b531cde71527e746859c6a486956572fc7a18e391e0. 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/USUL10200486.