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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70d815065e7c88740be246fc975d127e40b8e77b0f13fc637e0a4b116b5d2e6. 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/a24563f1-9651-4ef4-ae7a-cd5ced038dc4.json and https://artists.proofprofile.net/proofs/artist/a24563f1-9651-4ef4-ae7a-cd5ced038dc4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c06ea6e440e5321b61dba8f95e2e1fe59882b49264fedee42ab44ed5b99116a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ72383647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fe08db172f2d012b0b28ca4ff74fc58f59ceb51eee836d03440a0f34e2031d. 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/QZNWV2380734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c71253c0ee0ca184b28d329fa7076644472eefa45f6686b03cfc79531e6bad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEP2277761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29677d30269bb079b2cf1c08e27f391b3140b873605a99ff5f432ee8c7cda53. 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/QZNWV2380735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c06ea6e440e5321b61dba8f95e2e1fe59882b49264fedee42ab44ed5b99116a. 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/QZFZ72383647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e6b3fddf629b427e0a756278aac682691c4daf89efca1960ee797e6fbc082d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1443389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c71253c0ee0ca184b28d329fa7076644472eefa45f6686b03cfc79531e6bad. 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/QZMEP2277761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe9d781e81dae35e7ae9623961f06edcf21ee7ca8977e2ced2cb647ffc992ba. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA82236965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69f3fe042c196a5b70bfb796f5fe2f6ee74d3a0ac93ba6d9ec34db66ae1428e. 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/QZTL92134366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c570409283143d6cdcfde1dac9dbcb90e2fc78e32094926581f31fd2d65f025. 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/QZS7J2115647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c63a63b6ecf28ff54021d55fcf188f5669609fc5c5f12ce91f6a7bf711f375. 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/QZQAY2104296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4588bead92e99396c69090a487cd8d94ee5c90863876537f3956dc12de3b9dc6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ32166751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74204f84bfb9c653a7dfb0c155061af741fea1097e8c3c7ee3a5b2790c16e779. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6N2062467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb772a7b739d664d53980df7a66f1f38e3860b4b020c6f580e6d5d0d905e5c1. 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/QZHN72085823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17585140ec60725260c552f3a663e0538e3b63bc002c72e764e3a0a67aa6e60f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN72085825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9af44d571cbdd0e3e3f07837d2d67a46e3b45e8069f599461bd34ba0d0cb858. 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/QZHN72085826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a8ae1f62773892d68b629b9daa9779db1a9b3d0e1b94057f61ac346f12a64c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA72003556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f303e2f07ac7cfb1c2b5fa2868022798302c95ca3b90437fb1d1e3d4683421. 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/QZHN42024977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a8ae1f62773892d68b629b9daa9779db1a9b3d0e1b94057f61ac346f12a64c. 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/QZDA72003556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc917a82ac28f2560b83abb55103b2e9d2e86d5dbff50deb65ecaa726fab5564. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN81955286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8976ad911f41be6af1415fb6bba03ab92269498f1075278656bea4d2d6601b86. 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/QZHN81952635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ced86804d36e687905d796ca3cfc6a7b800fd3b161ee621df088e268395b78. 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/QZFZ61929548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa669a5b80d247716e6bd8ff37d1acd15578faaae3557c7552a460d52430f5ddb. 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/QZFZ21977729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885c7e7b1d33e3be6f9d20db6f0e39f0e32b316d7b57b7fa810120c984a3695c. 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/QZFZ21976479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095d9bdeca8c5154cff9a2e10a8aaf9e41cd0b7a95622061d28d07020ef8dea6. 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/QZFYX1953383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03545ad7d4772255c0ee467e9e7217a97b89c6ea6e3371e1c13ff5d27bc4783. 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/QZES61940309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e514b87251a23bf1fc623456db4192851c5d98be4372a68ffc743b9b65fa3c4. 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/QZES71813898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2a6c9fda6f5c9a18ac62ff80f51e09a9596ea5953ebdfaa4064a87518852fc. 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/QZDA41858665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f11932a16f46a531fe2c756c6fb82f6085d6a44e811155ea2edcf3336254b70. 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/TCADQ1813288.