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 0x05ba5fddb90d33a96363ba796ed7c4e18a5e1e06631e10db9cae365fa7b32a96. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1a01c2a-43b9-4589-9be4-df04f5e5d67c.json and https://artists.proofprofile.net/proofs/artist/a1a01c2a-43b9-4589-9be4-df04f5e5d67c.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 0x5329cf1c2410638c7c49912cb1e224fc8473c88a0a4359662501d74c24516086. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZMEM2543989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4418130c613573427e6e60f8f28012a760542dc7a77ff8baac05a5b027549b70. 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/QZMEM2543990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8ca26da818ef48447b4ed93e953ea48a63a48de7b00e2eb82fdac0741d9d58. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZMEM2543991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b18788781f5fa35105d713144f469a9dca965a5fca35b61ae9ff5a45755d23. 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/QZMEM2543992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd95ac8b1434ace7f735790cbbd225aa01b70099bc21cce72306f05678f3c582. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:37:12Z), 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/QZMEM2543993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f02e4c8b27fa9a659acbba505edfda4a80aecb98409a530fd1a665fb148f20. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:30:17Z), 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/QZMEM2543994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5e9e4892360f7f7349021b2582778766f8de7dafad43aab6e4a67409ce81f4. 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/QZMEM2543995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6381383a9b6d1306af95b073b73c2e7876608681be32b6b93f101b1ed1e959f5. 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/QZMEM2543996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044b97025568f77d4ca461ec3af56a96a44fc7465bb49c6f78d09a1bbd8121cd. 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/QZMEM2543997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c996bebbbd53dd2b4a105c04a7dfc0ab12cec5308eb3425fa88949b490b7fc. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZZ7U2571546.