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 0x7df8df8e37145e301ada09ece021ae6795aeb660846c69050cc1ea85bbf30c76. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a70ba1b-47a4-4281-833e-ec63ff92e4e2.json and https://artists.proofprofile.net/proofs/artist/2a70ba1b-47a4-4281-833e-ec63ff92e4e2.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 0x436b4d1b32c481e0c8b75da6e2423a5512d4a1cf5f72aba21a0cd43c6b74d85f. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:46:22Z), 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/QZK6P2239724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9116d05c2857d0f47c1fde6950e2ef190d48b0915c5765b2bd3e319564c0dc9f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZRP42216323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf57b457ed3cd7f2ca393d61e25cf096d772965242edf64eca48c2b66d51b6e3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GX89G2321849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c107d83fb56e6d20b1307ffc373e42a5435ce073f5e7f790360446a6b504bb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:42:49Z), 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/CAENV2370383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441f2f9888401bceb8211dea5b5c8d1b77735e05d39e28f50bfb9e998e0ac33d. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/CAHQJ2429720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3f7d4fa92c99e33f7e66a601cff0f2e5636c7fb615979d2d8768f119bc18a9. 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/CBEYJ2405738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e959422d59e48dc7bda83c585bbe6f4b19d70b3ca30831b70e2bf300e3c2d4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:35Z), 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/CACWV2525986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb355d12e0eaf336fe071df32a43955b28715f1662f6aee9237fe0e80696789a7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAGOO2504234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40763305e023c52e678411c03c554fee425855eac6a317f43f769dd4dab633b3. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:10:21Z), 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/QZZ7R2598948.