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 0xe5e68c0370a7eb0a633017f5b84a2de64dff885a3c637c838211a9161bda497c. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b82f3da-a971-4145-a534-5a4b85511b55.json and https://artists.proofprofile.net/proofs/artist/9b82f3da-a971-4145-a534-5a4b85511b55.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 0xb61ce509648511144e18b69cbbca43fe1b41baf34760cce39ddcff20051e9ef8. 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/QT2VB2425435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95a107d0494b632969080b992356a333041180515de703566097bd4f3703815. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QT2VB2425437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb237d2f59821097129cd46b03243abd0e8115ed9d64683320af3652d01183014. 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/QT2VB2439363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc606dcb1ca19cb71ad164b57caecdbd514f34d0a24b4eec5eb02134fb329b5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QT2VB2468089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c19f5aa0b40088ef59d1767e478465236b8d6647a8c1e316bdcf7fbb39fd0c3. 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/QT2VB2468091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bf89763dd928a4a91e2334a79296919887c3062cbac5316c0f52d3e8007a92. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT2VB2468092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304f852dfb4fcca12c830883fec6e13f6b4cdce32e53f0ce50d9c6dc24cf46ee. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/AEA3A2178208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1225e58ed24e24d0b6c6f37199272655741a7623bb3ed74e323f7ab5baecab25. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:50:04Z), 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/USANG2500419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ab71cc0b4a06a2a550ede3539d676618695799d256ccc2edbc895a53255343. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:46:54Z), 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/GXBDT2597591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb72b8e96fd5238c06a048d583d2608f85595d3bcca2999b1e1a2f325786863. 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/USANG2528046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0847e530f3bca789ef8a51d6e6180b080b786437c49700875d34fcbcdd386ed. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:41Z), 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/QT4K42581108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ae5056bbcee03f17803616dbaa527b8cee38789c0d6e1d1240351fcfb710bb. 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/USANG2532969.