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 0x9635293bca7b1561e1e1cfe2717bf6e5d852e099a36976fccff72b35e03cc374. 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/580eac3c-8c2a-4b29-98fc-3eefde114daa.json and https://artists.proofprofile.net/proofs/artist/580eac3c-8c2a-4b29-98fc-3eefde114daa.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 0x9a99192c0189763377d0b5348f307b6589a051a522e73f506b7f9fe6704a8122. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CZAY51600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f4ad359543974de3d55506d3be4bf5c3a37383ae2a7be47e9c5f82d2214a5c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZAY51600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2369e981df2152db16bba90f69a0a9bd3f63309f9230068fd4c442ae8f5f38. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/CZAY51600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea35b3d953b721cbaab8cdb9d261b34b0b8a72bbc8528d2c7aaf4372b7ed7c32. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CZAY51600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06f4c6fb328c11ea0a369ce0e63625620efe14943a52e97f70f2aa0fb6465b6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:20Z), 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/CZAY51600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2f3dd413248a5d6b55a8ffe59d9d05a13e2ad3f77e42e2065f8f3ff8c3cfcc. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:54:32Z), 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/CZAY51600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862a8b091541bddc3adf87b187bd17190d99dee33d214958500d27ea61edc6af. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:41:35Z), 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/CZAY51600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5830bcd66d17d5caeea8d9758fee018993b99ce8baf7020082402eb9d4ddda. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/CZAY51900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7ff3ef55bc9ce9b93fb7d256f88fe26d294007d8d491451798ba1cb16ab8c9. 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/CZAY51900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef825b094ed95fadac5b005450d35bb0c1b8866f335060e8f3c3b143fa68c43c. 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/CZAY52000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef65da71293a9fe4b220acd0a25654a033efce0d453e1a3007a8621f55c6997. 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/CZAY52100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12285943220b40fc6720baf94792d69852f7a0583f370efa2220c0ed7743253e. 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/CZAY52200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fe84d48aea0d3529a0a964650fb8ced9397686f3fd39a88c9c73706e04c17a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CZAY52300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e042d044a581405a3487a14f35e3ba212e44ce2b31047922ef23a9ec30123e4. 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/CZAY52300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae29866ddab2cb3925864cf70ae3ea518c76b27a0ab5e108159d0f5ff544408. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZAY52300006.