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 0x43848cdcdb484996f0d642f0f55ceec3da0bc2d880dd98cdd868ad2d7f10ffad. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0b274b7-65ff-4796-9ef0-b3372d005494.json and https://artists.proofprofile.net/proofs/artist/f0b274b7-65ff-4796-9ef0-b3372d005494.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 0x2af480df87f6d3aeba2035fbb11eb9454127962e4967aa5d270d06c7c02527d5. 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/QT3F22410941.
If You Sing To A Broken Heart, You'll Never Sing Alone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce5f2b2f9ce81d368f1e3879d9392d4017b86f697f6b8685a4b0d0d307f8022. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ72510036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d06f6c1b0b6f87d39d869792a4318b39a36bf2f33bab937a190d5940773b7c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZMEN2532003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54922d28f72a1dc1dcc39998269eff713718f0e9068b056228d577e161494fb3. 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/QZRP52513910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc9a8e388ae1c8596de9402c66d4721ba5ea2311018b2f87aded8b966b1c813. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZRP52513911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3202e345b6ea73dfdfd00f7cd24aa9221cc9eb2f62d4b786d48346d8bd7dc45a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZRP52513912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d8eeb9f1ceee0dbdaec3d78962ca36f426b962c30894a788130de9decd1d0b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZRP52513913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca0eb0a2ebc79929314e8b0275a51535f3955f9d4a0efc797580544c194695d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZRP52513914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce5f2b2f9ce81d368f1e3879d9392d4017b86f697f6b8685a4b0d0d307f8022. 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/QZFZ72510036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fc20968f67d47aeffd28a4ef2e29404bbb65423520a8c9714b94ce1b1d6dd4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZRP52513916.