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 0xbbe353cf1539308abd3f6379587ebcb134238b7d73b73b29e8b6a75b0ce3967e. 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/45c040a0-9f28-4276-93c3-3cc4cb8bceaf.json and https://artists.proofprofile.net/proofs/artist/45c040a0-9f28-4276-93c3-3cc4cb8bceaf.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 0x84b5dccab6f7de92ea603d027f0d7a2296f443161198705869dbc460274054ba. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR59R2188990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa578feaad9613db86569cecd0d60e0116c1c0be3d82a4ee8c244790b6fc9edfa. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/INT762400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86740692d9d6dd4e86ae9a805a0ca0ed6463bafa17ec46f6d69f2e17b4001038. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:47:29Z), 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/FR10S2233663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87aa13d095ed3305190d3c3d0db0a0433e53033d692092626e4a90072f90e8e. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:42:25Z), 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/INT762400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5a5d1f7fe8ce5bbc7d8e0e4f3f160c40ddc93f6e1b2c68164efcf61f8bd6b7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/INI492100288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e3a2c76d63b5c74b243202011b8c2adfb8baafa9d1968462ede45195edb028. 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/DGA072298887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c15087801100653a903f6095bfb583e1029c7bfcf4ef9f4f1824fcaa24cb5a0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/FRX202371294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0e7205d60b749cf11bed39bd0503f35ce7a337d40241d94d14dc42c471f872. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/INT762300291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5eb0e7f2a11d06c2773a16ae3c7cdfc92bb1dcad04360e3388f7c52dc0f126b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/INT762400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1c1c5d344b164bb14c4917bc6c79bd05d654598aea9cf48415d07d1f95c154. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/INT762500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205a0b7342e85c6ecd0c689d19b258f19316c0da6292a19b1a7f7ffcf8e240dd. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/INT762500056.