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 0xd665768dbd73972593009f1bed857cd7356403c428c42a9fba72ed8ba0f06fbd. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb3c26dc-2d2c-4164-abdd-8c7116fc2618.json and https://artists.proofprofile.net/proofs/artist/cb3c26dc-2d2c-4164-abdd-8c7116fc2618.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 0x6820ee7d750e9b53835442dcb5783af5612808fdac1eb408809e8983c9b23a47. 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/AEA2L2128679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa783926ce09db1238d3f3eea7a183ddcbcea157f6cc35c7d17505202c2b67a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:28:45Z), 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/QZK6F2520354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fed62fb8097b299bbb82e6ff7fd553e7f42625da086da1281761e8fd3c512d7. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZK6F2520355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4fab6c6dc17e6d71c9918ef5e31c9d4a4a070d5a7e595c94bf79bb9c3c7fda. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6F2520356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eb84509192c232bff128dda20102ca27d995011ad35f3a664d1448561fc0df. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEQ2510730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d1edf596c7214bbb7c85c3c269d6f9c52b895a4c211226cc48aa6089a4fe82. 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/QZPLR2505737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dfbffef43f1698f2b74001adedebe574dd96f1a8598a1781d4be0ff9c8591e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:56:20Z), 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/QZPLS2530791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884bb483b47def5f285118ed028d5a4adf738e4ec38f73806ebe8e05cf1eadcd. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTAS2578991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2682b9f15bedd3c253d1f4825e4dee86c0af204a1c1152733a992ea429e6f9c8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZTAX2515673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f8b6d4286d506fd0150fb2f4dd7d1c374325c9853f65af48c39e1c47ba40d1. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTB42550036.