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 0xd4ea561dc274a8a80716f326e9d7ee8ed56bee1f0a19e68077c2a18becc49afe. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea836fba-cd19-496f-98ab-d24a7527145c.json and https://artists.proofprofile.net/proofs/artist/ea836fba-cd19-496f-98ab-d24a7527145c.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 0x2d774a697c2ecd29b8212bc357a49f2018c510099c28a5b25bdbe618a95157fe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMER2387604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2911dfaadb3adf7bf7b6c2596d2bca73b8bb94d42898902197371e086bc49f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:18Z), 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/QZMEN2343472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2371fe50439f5089bd29483c11c2855da544fb72bf2d3abf6d0c20850c30b6c8. 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/QZMEN2341778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258ab4d68c32e5418eb7fdfa1345c7dc83cd20d95a08418ecbd36d837d119914. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEM2335884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0596d5e0d7bb8809b5f94adc9956491b199081022443f55e0a54deeb6528d95c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZMEQ2304996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc377d98301326755135c2302afa6855de78a46e87325aff3af28076bcefcece. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:00:15Z), 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/QZTBB2302009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f52d0a6b9d6e2ed2da098576a0a2a377a653c327b5a0a2bfb01842164653887. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA52417336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a48dd568f7d8c83193e9239c51b1ca8f0f3a955473147f3925ce32c139a7418. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:25:45Z), 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/QZK6J2469176.