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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 0x791e5361e3e4af911dbd893d3d5a39566a0cb84919ad03183d908d5a014a6519. 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/f496248d-4163-4541-bb61-831be4276d1b.json and https://artists.proofprofile.net/proofs/artist/f496248d-4163-4541-bb61-831be4276d1b.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 0x77db9735765c8d2464523c72ecdd3e8ac00aabf80132cad8723185ee1d4d9ec2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWX2436886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391020047d15dcdea965044f11a3cb58815549864f3ac656e4fb3831b622a854. 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/QZNWX2436888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159121b0984ae715ce477cc372fadbf051fcdf31e4237497e646d32294ff79db. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWX2436890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd96935bc2a55bc44fccbf8a8fce596001426cbe66a70c4f5c15e23fb56c4aa. 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/QZPEW2202087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e1320c092e2e2782e7ccfb3740fd7b120caf131a8bf30a93f6e516b53a2115. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPEW2202088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b17c293c664d0e4720d4e43940aa2a988e86851800e3721195e064008a90fd5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5BU2219080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dd5a5291aad2733b258f5e92f3bcfe0a23aa199bccc7465b8a825dd40fbcc6. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZTB42221441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed91ef94ce211cc0b43f95a894459b675a3c43855d82bcb97852073db72fac77. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB42221445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19225e74009e66cb29cbec98ef4c33d23bc14b7a257db42746a13efedda046d9. 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/SE6XX2123504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd8d23a911b3ba0d8f94fc73ebe07e6bd354c562a2b4d22cf9a03422afef7f8. 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/QZTB42221443.
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 0xb14fd1342f27ff3d94aecda0b463da1b9478559fed776a313fdb8a2f5f67dccf. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTB42221444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882d87e09d7b74fa201a4a6725c8a53e1fba45fd135710732a2d6ddcbc27b5bd. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZTB42221453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1c299a90d4f58b650708263c777614b65adbbda7cc7af4a1e161dd647d783a. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/SE6HN2142661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41808f144a96f9af83db7cf740d1acf00f36e7b59ad5016ede31e58d89d52439. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6Q2254038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112b7d0e2a714d9faec8edb238061ee519b33ba36863670386f71da4bd8bb3e4. 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/SE6I32276417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c76b2377dd207eb79a78f843997954990c5ab201a3c22f5af3b9b10d67744b. 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/QM24S2202362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d3d9015606b352b118a8eab1c22d1055fac5407265f09f9d1d4a82f70ee2c5. 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/QM24S2201769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f012ff7603a1a22f5b604250366eaa3b8e34312915ff1cb54ff87ac49a3593. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM24S2202361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b847036262303c10ce1fa2e22b96df308b8842dc0e9e3cb2bcce9d4e45b95d. 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/QZK6H2126453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf315d4bf88d74ae806873b91a7249b2805cfa54dce874fc1b0e00a3c41dcc76e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM24S2202360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b882914c0819993c991a7fcb40e57c56f5961f4e021eeaa07b496973119d95. 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/QM24S2202359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fca881c2888c7cf73e12dd6337c5a41d36198c84eb32cf7b01acb7ffa44138. 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/QM24S2202358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c9f02711a4121bd8dd23b131411f27596eef539d72ca2957b211753964b87b. 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/QZK6G2308159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462d229a94855a7f3c5593e348d4e6ab4d3fa3052242c16f6bf339427c511893. 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/QZK6G2308160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21268cb83e9ffb16a9859a5c1d521bca803c77133ad4aeed044c98f486f80b98. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6G2308155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de4c9c8ecf06a75c73246977a119c9c146ab67445500036c8905443d75fba61. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN42368773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9515ad1bdfe0d86e8f54814106d8ce10ebef971f4a35a959234e72937375cd. 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/QZHN42368775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8098b099f900e96a1098a415220af86d57eacd5ce8e4eaf9a29cfcc5914fe9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN92447170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120a5ec57bac6e448119a1d438838095eb12742247ed8132d8179678dcb05937. 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/QZTL92308500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d132576cca00820a339dc7a20a0eb1c2d1978c403eecad047ad34378a329022. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS7J2235415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00cf4ef9767beaa62c6d3eb3c02033c6f8a6f67b56a9406b07f884e2453a679. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZS7J2271044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2d21fca1667c49814444a2d621d404e321badb50add13474c8116f69dfe9b4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZS7J2224371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cc305ba35d0bf68a93897fb4725578184c24a171eb1af9d23260c11a08826b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPLS2296295.