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 0x506c687c74b8c1201dc9688614d6d67b190da9696d96a76203f362b742103fe7. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87aa6ee1-5469-4aa8-a769-cb31aba929f9.json and https://artists.proofprofile.net/proofs/artist/87aa6ee1-5469-4aa8-a769-cb31aba929f9.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 0x018e6198c8e7b0886f415545ed56340884717c16eaa86625fbad3441cbae42c8. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:48:27Z), 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/FXR752411686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c40e50cee1116c526157663696e75b05798319ba97fbc0fc0d45bd9fdaf4ed0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FXR752411770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aef84318111e18e6c1175424645e559abff2f046f071fca5e7bb601d2c30e18. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:32:12Z), 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/FXR752411771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2130b53e487172ade717761594604c29162e4462d23e0436b470beaeff6d3d87. 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/FXR752411777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ea61b071fa57fa72ff23dbed050bd6ef41f960eb296b522158e0878bc3bb65. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:00:08Z), 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/FXR752413432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd764a21ee536213d3d196f74f172b26bdf1edb33cab5100dc213a4c13d455f. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/FXR752413433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4071c887e1bf4acafa419efe6f293a4c644929ee2ad8ae68a24492dab33c5c08. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FXR752500614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88481fbbbe3ba67db3e58a188edce71ff61d650eac4e39bd1d2871067aeee03. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FXR752500615.