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 0xc0bda49dba2674aa9ccfc14995f62668f15514da735919d0f15214683fdd4780. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7c772fc-0081-4740-b61b-a66ebe4c6bbe.json and https://artists.proofprofile.net/proofs/artist/d7c772fc-0081-4740-b61b-a66ebe4c6bbe.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 0x62016f91c1b1cf520a75cd168ac69d47209df5a88e10cf8e9056ec5dc02341fd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DGA0H2316317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4383a2b093db418bdb791eeb44bc7a31ef210f382c333284197d39cde6443de. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DGA0H2316318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74235c6d0a473efdd227122645b082e797aa33ff64f0b2d9ecfcff7d5d7a9040. 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/DGA0H2316319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22b160e912a8e7ae532dab8d66e626a5b9cf493c5daca2d05d1138f25d77174. 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/DGA0H2316320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd829e13608113a0e89d56bde71e5121f0a3fc2e4f77f3f4e0c5cb4626cc6659. 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/DGA0H2316321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6dec7543edfeba03589d0bf77409ef12c93bfeb966c6b1d8c7da6005615396. 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/DGA0H2316322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327454e8c1046a800984bb9be65ff2c5b0e65392065f3525efadcaf87ca39f8d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DGA0H2316323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb3987e87996b76a3a77e85e5db423b7ca12fd2fe0c90f2f7cccae33fed4a7c. 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/DGA0H2316324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2480c24403a3cd2e6375732f79ed3e99bfe71a37bf0edcdbba54f2519d7549. 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/DGA0H2316325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bd93e842fd4f9c5e5e19cc89f0b5a380fe53e372902017af7de53f774c89dc. 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/DGA0H2316326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb129b30acb429baf57ab5f5950b834b0467f2a1afacaaf80fc827fbfa032a020. 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/DGA0H2316327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284ded9160fe945a4db2a454c699210d45543ee01c812bbfd9a4a8bcf262ac8f. 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/GB8KE2317319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe2668515bbc5c3dc3abc8a9ba9d7411a7c671ab51cfb4f4aca6a36f5e22f37. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GB8KE2317320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf328ecd7e2937395516c6d5177ca99c1282e7a7ea8428f5297ca334514ced54. 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/GB8KE2317321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea2a34e9548585d30318e2644a0261a8a4760f71f96251d3429b01a8f473f85. 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/GB8KE2317322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27f1d5e7a6cf04c7fecbcb6ee2115d6c1ff44b44b1b3a78e0af811aa18bb187. 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/GBKQU2343653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf243e2f16e2522a2b6a1beb760fe2db02bd157aa83ac884361deb2c475c4a88. 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/GBKQU2343654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14f271a71fd4c26a8030fac86a4effda1f3e6f3e145f28ec56787246f2e8082. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBKQU2343655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a564fb9fc7809bf57bcfdab810bf7a6207fe3bf6cc59d81fda280577764540. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBKQU2343656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4007027cb850437503e68233eb0017ac66f6ed4e3833660523a51b52c0a3f3. 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/DGA052303549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d74c75f198468c58a15891af15b699732220aaaf8e430367a08c2bee2eef0e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DGA052303550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b796e88d236f94ec3279ba41c2ebf6140e0f33e2f37687c21ccc61a58a6f648. 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/DGA052303551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d71b0d2671037cc29b36d43d495f73e4df90a98dff35fb3e4f91d7efbb58de. 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/DGA052303552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8101dfc73a13ae1bbf752355ff6eabfd225cd6bf566463f756d068813af51ab4. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEY472371614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea03ca72509010df75241fa4749065bc2207dc3c66419b861ea3dd3c55b0a71. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEY472371615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ec1f68849f7caad37a445a5b8753a72e5bfb1a021e9cd49b672edfb1b5c940. 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/DEY472371616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dd30bcdfabcdcbfe80f5f3c6006020816167fc46ddee50a35aba34ae1faf2f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEY472371617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0406de09773dea6b1cca1f25c46d1ac9eec32c808fb3f226cdfc9bcafdc70a39. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/DEY472371618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0453e964e1bc8297bd8afb94c1d5caf889bba742f26779224fee7f07a0525918. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/UKN6K2002007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976101d3795617271919875e801ce6163251589999caff5adcdc07829c638dd1. 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/UKN6K2002008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd601e4682d6a4f7a68ccb657bfe84c56b0e6467175d42fdc5176ec41c45e1c6f. 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/UKN6K2002009.