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 0x14f3ab063d0807065d62df7f7ca19bc32001c9702e2c10db231b19e14d542af0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de425a25-cd3e-4414-bbe0-1d2c2541e109.json and https://artists.proofprofile.net/proofs/artist/de425a25-cd3e-4414-bbe0-1d2c2541e109.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 0x1673d13311ffee00a34c3be655e1f395be416c56329547307f4455eaa8c97275. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CAENV2263036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f136f0a3f8ba61dbd1d4816054855c9db1f575237a92e4ef24e3cabfae9794. 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/CAGOO2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1673d13311ffee00a34c3be655e1f395be416c56329547307f4455eaa8c97275. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CAENV2263036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781e57ec055ed7330ffcdd4c39ce0a3869870e50e736374ba7b3561fd0b88322. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:51Z), 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/CAHQJ2348056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781e57ec055ed7330ffcdd4c39ce0a3869870e50e736374ba7b3561fd0b88322. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:03:53Z), 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/CAHQJ2348056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35042a89c44c96809c0c58981608b88c2400cd8b6d1b4218dbc5e29ab87e76b1. 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/CACWV2369251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35042a89c44c96809c0c58981608b88c2400cd8b6d1b4218dbc5e29ab87e76b1. 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/CACWV2369251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b40476a055f00ab4c61e61f741b51a0b23deb195a0ef26c6b9d33143fbd0d4. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:38:16Z), 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/CACWV2381001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934226ae9e1ec0d427258f9ce0c25a8b84b267b40d5260d892093780af1d4cb6. 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/QZ5FN2549166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e338146a47095398d253e822fb7e04c04f9e3ac7cf5639ce304c4f729a54d0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:43Z), 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/QZ5FN2549169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd130a9190ad05cf28da0bb5adcf5c8102d629d2c950f7631225a434ee7ed5aa. 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/QZ5FN2549175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0530704e7884a6183f8fabf0e6a9d8abd1236bdc244721bef4449002d8f9d4f1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZ5FN2549180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f1b60544640ab46853f62917337ca836bcd16ebace12597acb51494f4fe8ba. 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/QZ5FN2549186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744d28ea312439f4c90b5bcd38f6a26910a58dd50601e19f98ae68cab9fa5100. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:55:45Z), 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/QZ5FN2549189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121c99690e8403f3fbb61601a55743edaf0f2140873f7db5257529e6fbb4d6f1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6Q2516712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432eb7284f54e32d0f5518e2ce32ef1b698c47d80d86cdad6ada2effa35c793a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:16Z), 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/QZMEM2576456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ea485b0a7ab9ad8fc40fe93cec7b1df222a46074bd5af5828e21fa4649920a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEM2576457.