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 0xb20e57b7e9af8bff8f3740ff7ed4b036cbb6afbdaa8e62234cb747d1f6c9bae4. 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/58414d8f-1c40-4cf7-8a6c-544941f2aadc.json and https://artists.proofprofile.net/proofs/artist/58414d8f-1c40-4cf7-8a6c-544941f2aadc.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 0x1f3e94e0f2b20b3f828c5def5963b124738383da50d097003c8ee9852ac5cded. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZNWS2150938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c6536aec4d9837a5355ace9d66841f18e9fa041d89f0a98f7df0792c1f07fd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWR2196227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337123a786ab2491c7866f79b525156f251b0afe58cdbb8a5e234948ddec6cce. 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/QZNWS2150940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7999d97fa9ed868337985ec219b377ec31a261ec532af7492f74361bd7001c. 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/QZNWS2150942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9127f792240ac616e460b442c082e040fc83eebef1a80fde0566375a811707. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZDA42390788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc83af8c032f1a547141f3c70ca6f1d78506b1aee282e5e04e2d83b1b6b54cf8. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:36:01Z), 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/QZDA52317524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2e2cca790bd2f14bb7bb3eb4c8db73a1bb4d936ffc243ca9b65f75cae2e8cb. 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/QZHN82326973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a5408a7f5cd7cfd77b9dbd68c32860be6e4350a7132ed9e87f0878f98cbd6e. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZTB72377073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f98e12ed7bbf9440a42fc19e654f113e4bffe69c51cd751d61d5ed428a7700. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTB72377074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b8a779d7d90f66ea71b9523b401991d46aa166ea600e3e2f6b0c0eac586e32. 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/QZTB72377078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0fec1eb8b9134eea8d683df3ca9bbbc6a16b0295cb31cca5996c0e7e207e3d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB72377080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a45f3aaaf330944c819bac1e1dcce227fe570685739da69a223274b92c9a5b1. 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/QZTB72377082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a532302ce9c6c7a3d64a3b0cf58df793ae4ec6ed719f85d740332ab27aea8ee. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:36:23Z), 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/QZES82403618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26053f4218d35ad9f8da6555aa15630ab08167913d2baaf6e448d4d713e36b3. 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/QZES82403619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87609979a851978453625e9787b1330683defaf823a486b118e9561188555f4. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZES82403620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c41b30c7615c7aad4a2da60c7d27f815dae57e41fb0f9ae700085f23db4349e. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:43Z), 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/QZES82403621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411b07a087cab38bee0b800a422b4c88029cbd58d3a1592605172a0965f76bb2. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZES82403623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c4b59d7db0cb9ecd7a5dce238821011a12fe0434d7364b0b1fcc7e1fe1d738. 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/QZK6P2470291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135286cf5080d72567a91bf8b6f60a419176d9b4f20c077037a7b3b144f89d7f. 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/QZK6P2470292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a5cc8add1a1a93aff41c3b81312ce9d5cd32237db9e12f07c3b14c0530bf8b. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:04:44Z), 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/QZK6P2470294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09f8efccf0b50cf7a041902f6074977fd601e5a11356c25299097748df4b0d8. 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/QZK6P2470295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25ec5935baa7256b6723f2e45c6a0589fbb00d8a6645277c31db46a3b0345ef. 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/QZK6P2470297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db7585cdc47c74c5113d2168df182e78f2afb0055190aa985585f64110e422f. 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/QT3F92593467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d23e641f8ed7d403d9f18b852db9d46fdd65d3808cf377e0bfbdee7b662eac. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:11:24Z), 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/QT3F92593469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5487662aea047ed675d873b395de04d2cbdf2a7f7d351699a64481da307e3d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3F92593471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809317bdad607c0c5d3eefa38ae0cd4e5ff2339d48fb5baf0fd5d1aa1754bcff. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT3F92593473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4758b5a06e0906418bf60ddff9db484b6f11258d879d8a05dea6326178ae10e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F92593475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcb2effeda27677c481aa62b36e6e2ac72a91e078dd418fb619b0d679454fca. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QT3F92593476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e76c3ee36743a79e299ce4e55f862957c65b751b40bd50770a35ca9362472a5. 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/QT3F92593477.