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 0x695e3a72bc5eebfa9f6bcdd174a968532358331a056b4d1f3fbb1bad477f669f. 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/b1853471-c4f1-4af4-8bf6-b536a43f5041.json and https://artists.proofprofile.net/proofs/artist/b1853471-c4f1-4af4-8bf6-b536a43f5041.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 0x245bc4be3c51fb8fbc3c5686fa1b4648d2d3768e26a41617c7f8fa9cab825dd8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCQAL2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32c916e50b30f813b10a20b65aecb188f3bad148e9ec84d29cc935d070ea123. 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/BCQAL2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48be6a730c2883b574c49e3b0e110f8cb5deca7c629f0f993132cfcc4d40c7e9. 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/BCQAL2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca38a0de808e19e7e6fe70a66657353c293f3aa7637332a2668096fe24a02851. 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/BCQAL2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbfc3225c4b7817c58426e6fec60363ce3629966f0e403bbe499a5e76ec899d. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BCQAL2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d5c7e617df5592e0f7db3af7e028e6136a42a365797d48f58a571ec2e3ecf4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJV2046748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8ff94e848441a0e697a84ee66355a8128ff010c74d3d70b84a12e92403ac38. 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/QZNJV2046749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc206214a2cdb6a73afbd6ad30fa5f244e382c4be3f4de531ca671833c0ce2e28. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJV2046750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd491a5b00f4ac333732f92664b07589bce4e45bc5bfd41822b593437966618c. 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/QZNJV2046751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a56fc8f3f2277a9efb9d223f0f607a8da75d2fe98c8b21db5130f48d0e16b3. 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/QZNJV2046753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4eeb2a6491124795942ec475eb7cb947fb8a1e48fc8cebb30abb9d16ed0a89. 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/QZNJV2046754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64088f023ce6166ee717a29e6ab174fe1ad817f44637d49e28df454f6ba38a21. 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/QZNJV2046755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8ae46c414cfb6a7b1b96da8207dcab2ea32f6cbd9a9225c7677e83f735ed07. 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/QZNJV2046756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780dc4c8fd8c003ca1dd6c0cf65e81768d9cc8160059f1516444b7228960150f. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZNJV2046757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff93cab7298b8c95dcb036f5f7a68316e1c0d15c494f2f9bf09f14e23af24495. 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/BCQAL2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801d800d7324e4b9861318a0952ab3a58a7f540de9fc6e3da5ceef0f4c603706. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCQAL2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbfc3225c4b7817c58426e6fec60363ce3629966f0e403bbe499a5e76ec899d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BCQAL2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb3a8a80cd126df4254c581b2f6922866f874d4cefa6798a7b8a628301c30a8. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BCQAL2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51489c799841cda8d488894c4990b1e30b2cfccd18f3937691ee2ecc67ba6305. 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/BCQAL2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0cd4d5499c170c26e057a23f7323a3d0ce1a9973837df904d0c9e540233e2a. 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/QZNJX2061545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00041f4afcad32d09261d290e78a878c63ed9d300b155a828b775423125c9664. 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/QZMZ92030184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76322aa59761f99fb10d27b0e6920a81d6979fadf50d5567f2780ffd2b36edda. 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/QZHZ62055263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5ebf54f455e5eff6839328bb9d1e668b3906e6e09a222f35ed5473ba16f9b9. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZHZ42038622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943b14006fd9979822695c5a7a9c62b2bfb3008abd50d8c9dd9304ff4a5b4d3c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ42066225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4038024645e87ce4f336452baa5ac3178224fbf85233bac1f1d9e06bbe86d611. 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/QZ5AB2173945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea58e89d16ef6eee0c63dca966f505075c237838e51a28a13f8ae19b11a5716. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG2031876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f27a0c27feca90f8f98e59ce1126aaf78fa8e2beaf65828239463e31968263. 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/QZ5AB2044277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee91b8cb0eb17651a51cc89d49b75c661f81f904f925115a9a8ea2c9209f3fa0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ5AB2044278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c83fda097be617762cbc9cfbf2503cfa63a29ec23568ad6753e1f5398eb3bf5. 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/QZ5AB2044279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3db4f8f0935a2903de3ac39a93369c303e9a48e68a0148367dc333a14599a33. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:28:11Z), 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/QZ5AB2044280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94272aa2bec2ff94b7bd059b35a6ac9aa70dce8efec2df051fe2aa70063c502. 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/BXZSC2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589e9eeafae922ac0be8ac47ea9699e2a535a0012d9b508fd880043801ff32f4. 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/QZGLS2002960.