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 0x020e8fdb13341dfd2e15ccf6bc3c7369bd2f7ee5de0dc46db4f3c9a31be83a6c. 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/c483e412-b610-441f-a887-cf12f6864131.json and https://artists.proofprofile.net/proofs/artist/c483e412-b610-441f-a887-cf12f6864131.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 0x2c78a65970c4510cfd3594c75ef3bd0b84de31b73c42d20abb6aaff5ad933fff. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:30Z), 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/QZHN82018157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede59fd0d34d460e6c94506d6e087a8645a55fad3643da7a516e185dc5ac3610. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:47:18Z), 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/QZHN92046024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c2459050ab8d468a6a3a2d0767f86ad7933699168de6b18488327c981c8231. 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/QZHN92046013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec4c94f26f8ba0f93e18f25ec4c704b2896b5296ed21a9c84c74100d67a6ebb. 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/QZNWV2063979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1107deb695752ef1cd84c057bae73c4794fd20298870fa0fd91644c27034d93. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWV2064006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5453cd1a4d823b288dbbdfe374e27d7e6c841849fda973f4685151ba4ea71030. 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/QZNWQ2142657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd42836314cf39d0b9dd078d291cbced1fc69c10deace741e2e5e4c3e0a68974. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:21:16Z), 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/QZHN32577915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e2a83dd0550f5bf0eff03fcd8689988fe62ff9d8091e009e9124dc9360a687. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:55:53Z), 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/QZHN72546037.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd6638eedc42a1f3de28843239c54cc872bd6294c44bc013d69aba25c616cf5. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:10:23Z), 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/QZHNB2555059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3793c3741c50a9b2b55998bd12d3d83b1a05a01577b6f8109550a50c20f3a70e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNB2555336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef2c0b0f300db48bfc39b28e095e761df1c2da9f4a914bc2b98cbb561d91ee1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6N2560927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ef400e4d373086af5ca7c340951565989f384f1ce1169475a34cf08f7f5fd3. 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/TCAFG2025608.