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 0xfef613723e6f8bfa682be88e8b851fa99a95dcea81644795bfb06960960b5745. 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/e48aa165-ddf3-431e-a5b8-19ad61512379.json and https://artists.proofprofile.net/proofs/artist/e48aa165-ddf3-431e-a5b8-19ad61512379.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 0x15ba0350ed8d7518da307bd4d3cc24c18d6eeea93d301f1534d4144b86744b3e. 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/USA2P1804721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafa3a2ab30c7912a738cce02ccaa9f088f2b4c79e54dce0a6cfe3e59ed27e57. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBKQU2493162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0420528623d193ff766f97b80a389e08564ee582a8c2fd9b2f49602ef5b7264. 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/GBKQU2493163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1407c333683d234a346661f89308edc6c50f5d85830ca71e5bbdf33d2b4d1861. 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/GBKQU2498772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842a43c547d2f6ee12616ea04105d9367b7e1b6de850bf34c54cf88a8d6a7a76. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBLV62400875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717e5e6931f67c686706c9e968e9d30c06b4b833c617bc176d28f0beed87f575. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBLV62400876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f12fe46065463c3fafc33f7ef5ebf835cb6ed615f995c5122333f55f0b36dfa. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBLV62407555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8c791d287decb602e22a8c989665abf35ad4d577e4909169172165090abf21. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/GBKQU2513434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458a75422fd01039a941d252a4a393014b265c3f18ab1207a5a75eb328420acc. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GBKQU2513435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe24a827c87c1993e38160b5e6d2eb47366921f7c8f14af1dc5eea50e0718a70. 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/GBKQU2464497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500e2e859857af1317e1b952a6cc07dbaaf29d8975f5ab2feed65160557e9120. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBKQU2438858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717e5e6931f67c686706c9e968e9d30c06b4b833c617bc176d28f0beed87f575. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GBLV62400876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d41d3dc877dd36841921854edad7708bf4c46ed6dc4f224fb1b6d52b973d70. 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/GBKQU2464501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d6b6fe60f311b3bc7585cff7e008294f3085162d6456cc654196979391052e. 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/GBKQU2513433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fce9158dfa3a7530404c64eb0dbf637b811b7db9dc37a815415c7f8511139c. 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/GBLV62407556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0f283bebd326745df776f98cf9a47cb64de5a9c9a134907ab703cd5d0d409e. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GBKQU2464499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f12fe46065463c3fafc33f7ef5ebf835cb6ed615f995c5122333f55f0b36dfa. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GBLV62407555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ee01c2b917cf4c63c9ebfb440d25b194570378753b21476f8e5a3a68c1257b. 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/GBKQU2464500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842a43c547d2f6ee12616ea04105d9367b7e1b6de850bf34c54cf88a8d6a7a76. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBLV62400875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe8f54104ede17c188f8bc970d4801e233ac4e47fbba5220e0d634cc1fff6bf. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GBKQU2493164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1e26cbdd31767652cc4e087c8ee5949fd7816d1948b71d72cf84dcec1d4a5f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBKQU2438859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d3920cc97aedf10ba01f6fa5cd2656d17bf7786d9e3ace209c347b59a5bed1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBKQU2438855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462b49e17043fa27a09c585d76edb4878da73d74050cf285893cfa9546c41e77. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/GBKQU2510895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2e80fb424f7b228c080f40a7f8a52727e50eeacfe06767dda39d15154563a7. 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/GBKQU2464498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafa3a2ab30c7912a738cce02ccaa9f088f2b4c79e54dce0a6cfe3e59ed27e57. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/GBKQU2493162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56bd9a1e2a078e1758b9caf57a986841bbdca1e85cee572b0b8d908b27359b5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBKQU2497500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8c791d287decb602e22a8c989665abf35ad4d577e4909169172165090abf21. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBKQU2513434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458a75422fd01039a941d252a4a393014b265c3f18ab1207a5a75eb328420acc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBKQU2513435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d6b6fe60f311b3bc7585cff7e008294f3085162d6456cc654196979391052e. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GBKQU2513433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462b49e17043fa27a09c585d76edb4878da73d74050cf285893cfa9546c41e77. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBKQU2510895.