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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86f40f2cdb435fc6c948f6e8e157b96affc033f1ed6a915d57cae59ae10f744. Chain 2 (Bitcoin): anchored in block 953882 (2026-06-16T03:13:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0aa011b8-c759-438d-abee-09afba5aeff8.json and https://artists.proofprofile.net/proofs/artist/0aa011b8-c759-438d-abee-09afba5aeff8.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05d5f0c410998eb3ce7139d61459cbe56ded9ae378f43c403d449ebebfd8a46. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMANG2212695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c07b988d289e3358fa20d36eb39cd11614ae4045d6fd40a5125efbb5a7ab17c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US3DF2443101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02bacc62a4efd1a1f51d0a2bdb174a52d432e6cd4217e4a964da750432f9c66. 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/QMANG2254996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b37ccef60674a1deb76e1992b2602b86f6733117eeac8290c85bcc62c347c6b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US3DF2396992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1f353e5bf0d046a085ed61a10b575bdefbe1845bf10db32ab0e6d031282e99. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USANG2301059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155618b03f5fee9576e840c912d6dee556d91917d104a669d1e82f0c42ae2ad4. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QM3DF2366687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8586c49665a7a3a09463344cb9641ab67f02de96b0c2af67948617cb82195be4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/US3DF2479635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59afab664c51de3719f4b08316d6bce732d4094f1c5101b983e211fb9dd76ff8. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMANG2254987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c36533915df54aaa9de6947c9a50b2dc3218e56365678a0fa200919ce95770c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMANG2254979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48b64a178f42e476556543c28b2fac8d6a24919ba804ac2d5d6a77f812680a9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QMANG2488662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19afdcf5193ff3826e22f06e55298c14023b52d457276af87c6bfba54637d341. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USANG2458268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df13e485a7784879419a39b1db52a91659043fd5e30ee6e4095199bcc7d3e92. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QMANG2408709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c917a2cdbdfa9c38cf7765a030c78428e4bcd3ffb2b62362f3e37b92931fdf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMANG2396453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d89dbae7c0c8c52096f965098fd51c43bd1fd760e99290b245fd2d43fa9509. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USANG2400516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd459ddb52ae13c2c7a4ec4639bf7569d5877fcbecff348e7cea9821efc43ee22. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMANG2212683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44ef1329e212a9c5e068359aabad76bd1dae0bee0f0585ca2363ae1fa0a838f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QMANG2212703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ab7e308ab5d30f4dc0eacb3c25cc63ad7beb3dfebdbfbec82ad27d96e866b9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMANG2212658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607fbba5a6af2675c8d18045fa894486f37144fca0b95d2197b24f645f1d5be1. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QMANG2212680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462eebac258cb871f5a4642a4646ab67fb7f80ee2310d9eb1b572688ff615b80. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QMANG2255011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cff2e48d989fab5e2eaf3f1c6b27f4f3de2c3b8e39e84518f4ccdb2203cf15a. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QMANG2229128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67b46a7618ab7437d136f5066587f3983f5307fa22e28177bc84d768650bb80. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMANG2212698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de0a90065d98634d49c1402456d48cbc931b1d089264b7e3cd568d5ad6d9b77. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QMANG2215566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e18df51e6589eb1d58519d4d1a82b3d463177e9864050754b68f15f67cb8a97. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMANG2212696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7384a3448347e30ae3f481086184492f0a8545349d400992ca8b56609e28582f. 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/QMANG2212704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448cbaf93109b68b77231826d97ae174169fe85ad25756e374aefa24f608293b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMANG2212657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24b7ee4668e2a115cbc67cfcc71ee4c8f2245fef24e673a6a218bb1db60694a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMANG2212282.