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 0xdfd8995bb72566c5c8b8bc4f4011acdb381cf308ac26dc9af5ba266a9da80836. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc5dea10-8084-4057-b912-22d350719029.json and https://artists.proofprofile.net/proofs/artist/bc5dea10-8084-4057-b912-22d350719029.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 0x74b623bbdde0bb3b6c5ed90fab76bce2fadff4701684e3d0219f6904ea63a4aa. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZS642315993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07859386219e3ac4deaec005c7c662bee2108ce67434bbfe86b87eb414023742. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZMHN2300664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c243a6b492c2ebaf27c5f44a1fef0b7f2c290a152a028a01255d7a3819b274e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMHM2329732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd971d6616cd1d1864c9a7e9001949490e293a0f8c0f81e7f56e63ed182b9e24c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:33:34Z), 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/QM42K2323045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41149f185e07bc7cb89c93a5fe47bf3f8b438edcef8f5b5c41ecf05a90d9d56. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:31Z), 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/QZS632388660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d9cf4fd7eeb5246d6bb9d6e9d7a36a3a9384b996c78c1dd1bb6e0f3a666fa1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZS642313721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aace63eba66e295f6939593cd587a09db7bc92fc49c8fb08b8309c4746dd84f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZS642351740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499551e7ff2e8c51c754da57c1f5d2fc49bbed43ccf32e73dc3a288875a268bb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:31Z), 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/QZS642375177.