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 0xc9c733969ab732f6c46e4e2cc4b21cbd3aab2bde5f65107dc1b58eb8f091ee19. 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/272b3a7a-328c-45e7-947b-5175066de9dc.json and https://artists.proofprofile.net/proofs/artist/272b3a7a-328c-45e7-947b-5175066de9dc.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 0x7631da04eb7f025a80b9cd0cef4fe92fb9776479e8227e66f23f42d2790bd846. 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/QZNWQ2363798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2189c63de32bc9dd4918e3f57426688e03bab6637777ba1b604ef3a01fbe48. 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/QZNWT2201630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429dabc032f2fd1419cb465d5fc308289c3e871cdfc6c0ca78d284a80bb7e9b9. 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/QZFZ32261936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacb45d8da69326ce3fe766d2a19c87ea46edde548762a11bbfadc2541019e9e. 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/GBMJG2124223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924aed9c35af51ccc3843e76a7b1dd5ca55b6f4bbbb1b515a2c1ba7e486b7503. 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/GBLFP2091316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f579afbb8033ae2b3adefa678c7a4db38202b559f7bf1ad753a24dddbaaa34. 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/TCAFX2137493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590a67db471e61c30b5a880e4d75076e64ce94f4beec7c90529be375ebc69c16. 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/GX3Q92152207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbbbf37e837d6b302928dae08624f564899f19bce3c0e9b6e46d37f69a183ec. 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/UKXN22105592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8171d38ae7d594f379e31403ec17595581d639f636faa0fb846f37642cbc6319. 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/GBLFP2122234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568b0cc6597c8660fb7ca2a887408ab3c946c20f39eea56ea3a5b5300022dbe6. 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/TCAFA2053021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2337bf63612bee2caf923d6b4e88e88a5f6bdc711884f2b7ec4e9c00482fc98a. 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/TCAER2031408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bbfe26a49073e6de57171b53c3c8c5d1428f1829dd3714fec589e08afb3b0f. 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/GBMA22038730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4230cb0f7a3a016a0a087da6716ad3a12ca1e9efa7a2807e02668b720b3f5ce6. 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/GBMA22013523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf930300867cb57f8c9edec6ba9e2e8f12bea2d8fbdde9783d6978460b2ef3f6c. 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/TCAEN1920532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae15b72e63152b9c577466ce6434310d27e00b47b65aee461ad19dc3d8ea4d34. 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/SE6HN1900809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e97eec5f8b8fffc3e1ebfb2e262ffe5cfd21526b8ce24aaf07f7975296a197. 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/GBMA21994256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0873a8d5486b54fa362f6acd24b79e9d037554cc64cb6a1d9b6adc17004658. 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/GBMA21909468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab81c1c84244a20befc42d52341785281f09524bcb94e29ef07c27680c2ce7f2. 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/QZTB92423520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6e8d1324aa76999167eb55677d5716c7410a9ac245b294c170cae18d25b43c. 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/QZTB92423523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadd86ebcf92692e3d8b427c4996f2c16ba96f07f84b3bb0bd47fcae7602c8ad. 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/QZTB92423525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c274ebd9341ef3c84783499445aa5d289a03401bb796eaebc7cca2bd621db4. 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/QZTB92423528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f5715a1c742fac1211cb9358501a2c827f1579ea31dc86c245ec112a59df18. 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/QZTB92423529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0066a6274292c410f97fd0df2612aeb54187600dc5037b482899a279d668d10d. 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/QZTB92423530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195957b188b52937a2fa835a8b962693cf76cd1554a9da7c4a04a9811ac5e07c. 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/QZTB92423531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b57fbe838c2a44834366bcdf200ba06035114f7d048612e15e77610929840c. 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/QZTB42489125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e350b1f004a4ac5239cf4504e3533311f2772c3794e146bc4ed1a48526e12cf. 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/QZNJV2135097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01544f09594e0a74b9c7f8322d969fcc281703ec2628de28fcc714d14c0be5d3. 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/USZXT2453368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e350b1f004a4ac5239cf4504e3533311f2772c3794e146bc4ed1a48526e12cf. 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/QZNJV2135097.