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 0x8b13d12a1b5ccfc52320c5ced84d890bc45089d73b9f4fab6af5da925a114e31. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7efe9bc-9d0e-4159-8d34-b9846ff0e871.json and https://artists.proofprofile.net/proofs/artist/a7efe9bc-9d0e-4159-8d34-b9846ff0e871.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 0x51c697afd9bcf406d6c368aaf974e682e0c951468c2bca606cdcb954d44a5ab5. 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/QZFZ22379569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f8804fff60b4e463be7ad477f3ff08db66b9db8cb1d573828e512a5288de2b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZK6J2085172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2db830cca52c771b7a43f419fc6e17216201e911a2886042d96e00c809b9ea5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:40Z), 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/QZDA62535620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02c14e6f2a91b42547e4795caa47079b192204c25158d96a10ba85052340722. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWQ2565517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62e5876b2cf6dfd2bd03e5133bf938e83eb2dd3a5d39ac6a1e6f9125182ad48. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:41Z), 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/QZTB62546494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea3a22754fca5b8c3091dd787499fdeb0423e79d379be7def1c7bc2e7751899. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:27Z), 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/QZWFH2502796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fd7e83f7918a754d3d81320a6e4dd6f5ecfa39016cfa32a0cb5b50e7c5375a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:00:17Z), 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/QZWFH2597124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe428a77b20139d654eadfebd17d0e3a99738cc4e62bdf2a2c505ddd308f9df16. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ762519644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7803bc452050c848d4f3d443904eee790c9a9ee487632208f9b8ffaae5b605f. 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/QT3F52593503.