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 0x6cf7290e099e4e4755b22888fbfdde23461d704348f40145d25c7d62ef8f8c5b. 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/e869265a-1b42-472d-9d94-c55350eab52c.json and https://artists.proofprofile.net/proofs/artist/e869265a-1b42-472d-9d94-c55350eab52c.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 0xae0c5daeed7b368ae4ce5fa023692b89fbf5062cde68e6dfbe9da74ded4f23c1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/BRXM91400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eabbb1edd8d6131bcdc530c7947d17557edb1ee2815d72ad371efbadda6541f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRXM91300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfde1b0147e28c63b2a5f056ba5bb7c755f1b82ccaf47db9298d82da78a3f3c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRXM91400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f58a818f64e06cf962d72be9dbfb952b4c3e76775b525a577784f701b6a01e3. 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/BXG6R1600143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbb45fa42d89440cea15d7366b32762f91c6202f4a115f08aa4cb259a287baa. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/BXG6R1600165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9efa85d6b7b2155b7dc0eaa9296709ecb6350e22948fa0bf340c80cc88c014a. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/BXG6R1600291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9b218f839bb3d199e918f65f015661e27554f2462e8af50a318f1d596d58e2. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZ5AB1951751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf8f2e04636b8548af10502ccfbcf2680565c62c5861cd07179dc7d1490123f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BRKO11800121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f03eeffda12782dfbbe02d6228fc8408420fc52b906f4aecdb1d34a5f0b0e9. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BRKO11800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd27417a87b55ce19f56100f3976f540b50fbfcaaf26603885177b8bef41278. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/BXKZM1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4337d81b24c949db282e1d0b1442ff3da98db81292fdc8ffc062f471f6d42a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BXKZM1900139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4f48f2d823378455385a3788af3bef0d6ecc63bf26aae7ad201f1226ad01c4. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/BXKZM1900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0944cd54bc555206badde579238c294fa368ee009c5d1529f60aac5eb9b393. 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/BXKG22000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a18c77482f350f5dddb8bc47352b6beb6d26b6bf496b7d8e49b0c4a6acad96a. 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/BXKZM2000427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc181b90ea9f2b549a358a5d3edc95cc45a1bd7752457aa4b8568af4255e0e2a6. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/BXKZM2000657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc316d556be3d2a2cfcc2901f41dd42aa2f1c38da35e7703bea7a5be7b54c5150. 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/BXKZM2000825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c11d98bade4ff9c1afe1eea7db55bd40cf8840a9e38f7978b6e2bd012b6ab1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZW9L2238806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a482fdcf9acc55f342a80eaf2659e8312362cc307b90223f42e85f37524550. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/BXKG22302081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383187394a2b9185f437d725bb2578d166b26237deb8d1af12756ddfb721ebf0. 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/QZNJX2526741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4d281fa4b97ddb6ad5654672b5f7a35e6c0d3a44f11cd45614d7e55582ec02. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXG6R2300748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b87ca97326164dfc20bda70e45e6d1851b9f88da285b9e44c4c16790699aaf5. 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/QZ5FN2472028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e4363b485b1b9bbfd219ae1b5b3ca373642fc862ea239fb58611c46b4f6093. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRKO12300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6801eb8eee7e33eff346cbf50e7bdde6c919035c3e38efc7f00ad9fcf41d6526. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJY2163943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc808fac968fe11540cfc28dcb5befb6f3911e3172b11d9f4b92b40256c26401d. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/BXG6R2200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a2bb1976584d9c92cf5d982a0742ff108234f905305e67a59e013a492d74ce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRKO12400974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa851ecbf656fa51544fe7457f30ca79fa0003bf876d44a9a96ce4824389ade43. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC3PG2500284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0cc20fb775229e0ae9e4ee85d9211ae53315e059c32305e085003abdf09e54. 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/BXKG22302475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fed3583ce6bd66799d56bde35c42e3abc416215f58a9c342e2c55fd72ba279. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BX1TU1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44e14aa2287cb4ce3d63a5e09e63f84edd56c1f2f985c4c1ec0079cf149a080. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BRVFW1800008.