1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x210d1e09997b9a758af14471d98b1c860ff00100fb370552d61262719d3c2532. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f03b5d96-6a20-46f8-a62e-5f633338e2ab.json and https://artists.proofprofile.net/proofs/artist/f03b5d96-6a20-46f8-a62e-5f633338e2ab.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 → block OTSBitcoinBlock must exist at that height 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 0xb015c0e6654545d6a76379fa2a63aaac15f6ffdce10b5cd0fae9517cc86db04f. 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/NLG620521526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cd2bf1de62a209e1020e3e4355f0fe580eeda5f779551c0e32fb569190b5d3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLG620521509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475813010a5b7eab790f26788b7ba305731c60dd8310f7027f787ee2a1feb698. 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/NLG620521531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7d9f8bafe6b952821c86dae713f1d96f305526a87ab7129f2b1e29a148286c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:55:52Z), 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/NLG620521532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66e4b827dbe34a39cd5253950698dd3d524c4a73152646e732635bf676649fd. 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/NLG620521521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779b1b44c0d31a72b68b5c2259740e909ad5700dfb118e3d981740575a89c15b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLG620521513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6992b601f25b56286f329f08a4726998b47a654154f925b368380f39b561be. 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/NLG620521546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1eccbb17a85913aa40a9035d4cb4824fdb760646b7d841782282415b6ac9922. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/NLG620521547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9915632a85dfa38423d902a86c1a6b59a5bb6c43fa10da19557bf2e3ed85f38f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:11Z), 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/NLG620521553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebbc1343801ef4ab17c06cd030962724f6834e7cc5ca066ae23f86c046fadc7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLG620521557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4592909842226a407d1c079fce4d8d3ade2ac73902f508e3d25c7710f9be55ad. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLG620521559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e80d5fb55e22bdbee09d712257b17f8d45ed299aee43d2825e24455ba4ed66a. 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/NLG620521512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d1d00998e80a83891f9e8a1fef6fb5d4f804466bf062f9751814fc1d3841f3. 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/NLG620521511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd59ce920810a7faa6a735823d69fd1c5a078837c7f24caed06dcc3ade8704d. 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/NLG620521514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1e8b4440a5bb70c3d8d4557027ee283da05819e7f18968f592680364db1777. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:55:34Z), 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/NLG620521543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c70b64cecca89141941a7f91124c8faabab4b0c28caed0a954fcfc13eb9a08d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NLG620521518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ba9dd1df1f414298bc14776d70fa17c2843971bd1650500a1bd41dd1e6c93e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:56:55Z), 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/NLG620521519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca615c8155b39b9eeb467e29a58ab9bcb22c827c6f591a64bb060719d4b67bb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:16:53Z), 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/NLG620521520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f7d2e5e985e56d87cfe14e0658a1e413206fcc2dd910d0057cd3c0c02a7c01. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/NLG620521515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87797bfcab1adf401305390438e02fa775e96c289ab033922a621d2508230ac1. 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/NLG620521516.