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 0xfe23fe587074d94319f61341f72df9db2d54cf048e3128ce5fbc7ab6eef7785c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/805925e0-2209-49c9-b831-61a78fed673b.json and https://artists.proofprofile.net/proofs/artist/805925e0-2209-49c9-b831-61a78fed673b.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 0xa93322c6fb04ecb7ed0580e367c70125abbc2306db17b84b36b434171ae39511. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZMEM2336615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785b8a30b03920ecf9a847266c87055448779a4f5121d6c1bb492662654568a8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMEM2336623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a9bf2ef9ea3be11ca025f20c17bf757d85878669336531f9042081bbba4b91. 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/QZMEM2336624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8b89b739fcaa010ebbd6be9ef982f2c4ea894d340ec29bc57b3d87c467c5a0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEM2336625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68af91983976d272c8f64306f09d648163672a0464f5a63245580ceef3db281d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEM2336627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ccc6ead1d90e339e53d4cbec14e408ebca5bb8b5c6bae27bb4accef233a5ea. 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/QZMEM2336634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8793316802cec57aca9ae68b6a50b1ac0b3e05fa78480e8d1fc618226f56e8c. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZMEM2336576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac119385e047861556ebe23e2e8e0e5c20f84f54c92ebdbef6c307219f362553. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZMEM2336578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bd6727d61eee2244db049cf6cea98510d0037f40801232555207d3db3e9de5. 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/QZMEM2336580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d0bdce4e80637f851067209919a83889fa2df0892432faea9cd756bddeb398. 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/QZMEM2336581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60146c0f841bb3be97c013da8d3468f5485c5520c9d26342a6347cfc792dc7e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZMEM2336585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db39f46e935f810569c3939032bbe4be7e074016bc58952d4f6884c54f66846. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZMEM2336586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcb06882c8df0c0e6ea6e7e4b71f46656c6af4522ea8361d02150d5601c35c5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZMEM2336589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa861512fd9da24481a6c1af9d48a43f2880ab76a09a1d33fcd3071c6dba36d3a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZMEM2336591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f7c8a9aed400a49d64de3786bd34f7af50b27c6cb7303f5b46aec3451d869e. 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/QZMEM2336597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f5fe29659e17214f9d85033df745d17a96bd45253600bfb46f9405509408f6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEM2336599.