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 0xff361bae171125e8f1024d4199ddb941def802d81cd19b38859edea1767de73b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f96030fb-b746-42e8-9de7-757d9436fa9f.json and https://artists.proofprofile.net/proofs/artist/f96030fb-b746-42e8-9de7-757d9436fa9f.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 0x50757edfa7f8557034e65c8a90059605b3ddef767e3fe5e26d582570f71553b6. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNWS2044541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d989397407079babd6b42e664621b5ab6a2c2a1c74724c2990b0dfca340ccf. 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/QZNWS2048028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee7db4c1f165e2669a4d727f938055ac0a885895fd770a32492edc6f9b816ca. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZNWS2042044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a94a1d852cd1ab86978e3302b8aa58b1b147bc4f048e6d0fedd674b56976e3e. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZNWS2044551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5330e537bc8f593ac9caf574a1f32799188df9a33f1494c1488943eabc5f70. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TR2181900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229e0bc301f032d046363ea2811f6405d01f9d1809bced89789d6ec2b7e0061c. 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/TR2181900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60903039d3690322147faf0df4c5157da3643dc996d41fdc1736240dbefdc2b8. 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/TR2181900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8559aa958025c23685c9eeda88b4d01a026f2c9148c90320f16b4c736f1d8edd. 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/TR2181900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5b06486299c85dcce4edd1924642c9e3add90dce43c9ae4f7bf12736020e48. 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/TR2181900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed48f351fbcbebf18bca0e522a782984707868bccf27fd66b529daa76f04927e. 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/TR2181900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb095fe47570e2bbfb3be39ffa694a1fd0637884f769b6e77162c35feae46a5b4. 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/TR2181900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5306b98e9f963c00739154f8d1471ae11448fee33944d773e26eaaba4f4825ff. 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/TR2181900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c93185e8dccd1b34ba9043d0f4fcec8fa4b69cdba6469b2949b219d589726c. 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/TR2181900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1b92e9a088b576c6404282ee32df2c6a4a0dbb79cbbe611bb9de33f1c4d830. 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/QZNWS2044554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe200e566de9676e94542de2dd8312e127e70f5d18b2eecf828cee5ab948d265f. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZNWX2185174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de21e8d9d1b623b1db7d0f89ac4e286e318fb7318bd3ec6ccf9bd06327a6d0c. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/TR0532315668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e1894cdb836c00ca7c3b33c39ef95da8b88891717fc7edeab938ec8d1445d5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TR0532315670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9855405dc8e393c3fd1bfc36bc20709e55cbc81869015ad596375b26255b0275. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TRA162500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a279a1d778b67c2ff19584dc61742092da8dd4a47223b5f3e740efe5d370de1. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TRA162500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c7b8d9be25477dd4f6938696808b989d26ae60529cc327abff9ea58d896253. 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/TRA162500237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3020df83ba0a852a41d1313cd4e08f7cbf96f59b0dad7304edbd370898341f5d. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TRA162500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c79874d5aa296ef70dee697046abe12178194728efbb20a2f6edfc01b976f2c. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/TRA162500239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a94f1127b5fb080b5d6227ba05ba58f70c7df342c7012cc0a13467b767d7174. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TRA162500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7406702cd0fe5315b1d2268dbb43155228e24fe3ff30574add537b8e816ddd44. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/UST8K1654642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9e68303306ce575ed297053aef3601172d9032711c1ff7880736cf094e17f9. 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/FRX762006309.