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 0xe38912a659b810b9b29e0c3080197ebebfcdcd4fe830e8f9ad8ddaf85f1dd327. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f18850e1-b3e8-4eb2-9b14-b1edbd40705d.json and https://artists.proofprofile.net/proofs/artist/f18850e1-b3e8-4eb2-9b14-b1edbd40705d.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 0xde5a3e4fcf0ce79a7c88b39e6af02a446ae6d2654a8691d44ac6e462038a038f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TX2308721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aee5b260ff92352aae8043a5aedad147c55e085e9661aa7fb6cf40fa2ae928. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJW2465970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619cb0dd7da5d316ae6a1c3cd0593cf096f78be76e555bd81b2a44598c3d9d88. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWR2247019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe386f807a99b8a218fe0a37836c83ea66e0d9954faa189598c94ebd48d7f93. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWS2122609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86abdaa507c150a706a99d3481cb567267f6f3e93633f9700b5e702eed0c83c9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6K2135625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d20a2359da1d853f7a46b5587af4f7bc8a7a3e85e098e22b66999ea223d355. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNC2188759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a34e88d91e793219183131ea3cfc2e31cadad52107aac4ea015f2f93a9380f1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES92125680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcb4ecf5650e7ab9b58e93173d7af37911b7b0a38137675de7b210b527bc165. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWR2065921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48a3a92ca41813bf1f34cca4c1ad003bc9d2ddb7e068227adf43a0090cffe4c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHZ62242464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afc979a30736f3310ded4e8be2b30a1d69b66c39af4203e0f69ebf4eafaf3b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2271015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe976d1cabfd5fc10f68c7c725404aa57bb132af5e53fa77c8de122f4357107c7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:14:11Z), 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/QZHZ52281673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38271fd286d9967145095e71d4b34ac300166544443af06729f99912779b0947. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHZ62242471.