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 0x5120fd0ee04f05ca1e81e403b4be43a58994a746fdad1234d06feb9d5278b727. 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/1c9bc52b-d1a4-4be1-8a8c-372a2be8afde.json and https://artists.proofprofile.net/proofs/artist/1c9bc52b-d1a4-4be1-8a8c-372a2be8afde.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 0xcd34d2991738741231e5e08fdfc34d8ed9397ba92cc504688ba7342b50b3752f. 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/TWA470726001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39536f3e9d615370d6659fc79bc66d313ad26273ef35904b6a20f4dc60eeb597. 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/TWA470726002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d216f2fd3dcaa452b15d91f0187b9049d89cd755dad985c06ff3b1b69479b96. 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/TWA470726003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064dfc067880b2ebe29df562bfda0ba9845462fdbf8a569d62cfdc8af4dc311f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWA470726004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1806c754338660488c9c3ea84c89a27cca9c8e950a11bcaa9de57f2f09d5256d. 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/TWA470726005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d417fd07a3f3485ef4ce8ea8c3ffe51808692b1b0e12cf2b5e01f1151d38de. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWA470726006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c1806c4710797580c666241645596dc9680cd2d07792d8048f809202b18f7e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWA470726007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e69a3491507b3f312b6fb16a57c384b2286264d35695f92e6b819dba4a6510f. 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/TWA470726008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ee796b911761bba0aae13c6e9e84256781ef9d57313c93ca7bda3508f10c2a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWA470726009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09de37ef0593395aba74bdee0fb772f0590b095c5fb9359c995736b9924fcda9. 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/TWA470726010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd8774882990f1c440a076da2dcb5cdee201fb10467b5898e85a69389712fc. 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/TWA470125001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f83d067021961f56a80599432b5bc6a54383a543a780e207a3323a6d2ab202b. 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/TWA470125010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a421e4b52bc9f8e9f933b3d4bdaebd7466d9e8600a8d57d8075c9d7d0a9e26. 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/TWA470125005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd8774882990f1c440a076da2dcb5cdee201fb10467b5898e85a69389712fc. 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/TWA470125001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a421e4b52bc9f8e9f933b3d4bdaebd7466d9e8600a8d57d8075c9d7d0a9e26. 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/TWA470125005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4cb16d480fb4dbf212fbe5af74debf24e81e1ce1f6c760f50dce1c75fdf7e4. 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/TWA470125006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f83d067021961f56a80599432b5bc6a54383a543a780e207a3323a6d2ab202b. 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/TWA470125010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3e5230fd2877498249779f2c2edabda2f34fbbe758b5b5fe4b4cc3810d54dd. 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/TWA470214001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4cb16d480fb4dbf212fbe5af74debf24e81e1ce1f6c760f50dce1c75fdf7e4. 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/TWA470125006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7228e2715d4838f7fa35d3a007b55c14a2759a12236d2f80fc94f423074e1461. 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/TWA470208013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fd557a0b8fa9ee371ce893d66c7be04f2d54a15c67e5fb5f93a6c641c6a238. 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/TWA470214002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf74ab54e0d7cc2bfe4fbfcf2ed81e92d6cbafc2aed01339715aba46006121d6. 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/TWA470214007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c8e1eef1af131a4b8971672f4c3fc91bc8f2a7f64548220f2548368caba37c. 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/TWA470214003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39536f3e9d615370d6659fc79bc66d313ad26273ef35904b6a20f4dc60eeb597. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWA470726002.