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 0x867b6fc10ace3b7e44ef34fe7e8e30db601723baa1fbf815a46f636c238ee969. 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/f7f70125-3ae3-47cf-8cc9-23a3ecb47467.json and https://artists.proofprofile.net/proofs/artist/f7f70125-3ae3-47cf-8cc9-23a3ecb47467.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 0x50bab53bcbe9636eefdc30d4a38dfbf1d593e298d20dd2ec27cd3900e07fd760. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HUA181014504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a92efe14815217ed33c6124d2bc58f8e2b89f7f300a1035c5833b49aab7c18. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/HUA181014506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175a483933f2cd73a4c363b653b17deedf907a2c1ce9349a34a3e8f792ee19e3. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/HUA181014507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0956edeba3b216114299ed5407997e5107f0277b6028d4e991daa5632aa8bf. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:35:30Z), 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/HUA181014508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f82228bb5ecf67afb4a92420bb663936de9748e1278e8205f871ee32ef4f956. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/HUA181318901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28746616044e02997d60bcda4a695797e43f486ae95530fee5adea56c92f304e. 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/HUA181318908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b845d2564d78d88207f6dfde1bff2269c49f5a5c3c2894c7655961b6247ddd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/HUA791400626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7125148c46af9cf8bb7ed6531871bf4903504b8b6f5ebc074f59782479663f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:35Z), 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/HUA791400713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3d6ac05114d1d65d2feaef4c34c2de627ded5ad6489ed431026ae871e73273. 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/HUA791400442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0e86891be106d7dd6b8db0f4f68f101cb9cb9258f183f01bd36348e8cabdc0. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/HUA791400706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0292962f8fb0d7c9ab6d6023726173f9eca58befcafb04b3bb0d1a9cccd1b4a7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:45Z), 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/FR59R1814593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc79c9a07a2dcf49efd558606616a7586bc70771ee7920e66f19d3ad97dd908. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/HUAHC2000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e63251f4d52491edbd295ec98810a3f0c22a6113271fe90273b87c15fe4bf6. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/HUAHC2000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f05abcf82bc724a877583537373acb76d24b0ac8fabfefd7bdcc1a113f23b8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/HUAHC2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb573649bb6d949b25579b69af60d64d0ac3a1acaf72fbb49381b28853b173de6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/HUAHC2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf11b7cd6dc28cca36370482380d7d53c96eea2d5cb211b072fe193d2890b6f1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HUAHC2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa98a4c6b3c0b0f1609878e459a4bea41bd6b4bedee4e1d768861069f9db039. Chain 2 (Bitcoin): anchored in block 957648 (2026-07-12T03:52:24Z), 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/HUAHC2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d8263ffb8ae7b7d0d7501df95d0521bba2cb135432d5fcfec0749f4bb924bc. 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/HUMAG2013282.