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 0x52a415e65ba1e4e77f5da8b1df79b69bedb43a61b9e83934e5bd50d6a2a0820a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e7f6204-710c-4d75-9e67-cadf559e265f.json and https://artists.proofprofile.net/proofs/artist/7e7f6204-710c-4d75-9e67-cadf559e265f.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 0xe9c4bb521042da8e9c4da31dec403921d08eb3331469f3c29757429d236fbfdd. 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/USHM82565023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cc3a6f1f48617c18e50b61c000d2dc655daf19cdb732ea9d35b93092128a75. 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/USHM82565024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6e20fe62c43c3d8001e87da3965ef303d26eb26292044feb01bbe066285cd5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM82565025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e12e68dbd92e62422ae37f9463422acde908b8d2eb36c0e35a8738035ba25b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:33Z), 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/USHM82565026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27c6850ba443b7d654df96d127094bce334253abc4d8c11ed36bb448862bb60. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USHM82565027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59011f1bebeaeef7dd986c14a1f1ce1e4ad8e479c6aeaef373dce071a98725de. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:37:17Z), 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/USHM82565029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20c0f1cf2bb5914ef0c02dcb74413d3db6c1043c186e1537bacd455708dc45c. 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/ARQUU0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6dadddb13b92b927d6dee06c8c78bfcbb5d665ac0e8bb1419eb121f5807e2f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ARQUU0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5bd8cdd329b7d12d433fc3dd757125c99dab3aea9d39aa558ca5924565459c. 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/ARQUU0800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbd57ea8ec9a716fc995aa0af679bbb0ec85737ed24e7dd8e094156110a6a19. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/ARQUU0800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8fc620bbc2e291bdfd8903e5825abc5d7d69346511ddce3aba762c2212c85d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:03Z), 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/ARQUU0800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee36f6f729e8ce722839696871b8d92cc6a920e22769f5c487bc8fe0b5824c89. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:48:54Z), 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/ARQUU0800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f1f0577297fbd828ca704e40c5545e23bdc2e5b92d7fc49cc48489a32b3b1a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:32:12Z), 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/ARQUU1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fba8d4fe55524292d613b0ea58e8eb3e618738cf9fae252117789820ef4a09d. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/ARQUU1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cda704b3350b90f72603175d3e0587384c1a8a07e24a8d497d7617d00eee196. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ARQUU1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1769ceff37cfadd48bc04c7f59a69516663c89ded672fe8e0fbdeaf75925457. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:28:47Z), 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/ARQUU1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36990980d634f7b96db206ec8cd1b6a5bcb3aa82141c4416cce753f8d32bf97. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/ARQUU1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916c613735548c2491619ebf47b32af71fe2013ff1c5d9028b3a89774e23728b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:48:43Z), 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/ARQUU1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904e236524430104b02162eb87240679ec4a5b030e4eceb70bffa9eefc5bf0b6. 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/ARQQE2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba53708a524476b2e080f6e879982057c8d9fb050d086d6f248560805d1b7c00. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ARQQE2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99a2d574fef61becc26b9b8a02eb89a8e011f65b892e3ab3c3fc7a98e6f5d93. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ARQQE2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101f550e05ae53ed2aa07cebb7a7183f8d2f4f9063fcf497140e6092cb9cc9cd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARQQE2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac7f2e116801a82a54b2dc0a6f18f79f791cf4aacae9df2b132e6de2952ca38. 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/ARQQE2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bdba0703891aa9e6d2cfcc7c3063d1656df1984503b1fee644548ef894d3ca. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARQQE2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7f309675c125fd9a5dfab8112547a7fa622950bfffcf7e42d12b4aadd0626a. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/USL4R2311041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4806d7598a1561d839696a68df7d75bbe9b7b7d6a13cb366d85af70a7c6f91f. 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/USL4R2311043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd14b9f65408971cb8c4ff560daa71fb1c7a6b849916a31044937c35501b03a4. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USL4R2311045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670de9bb441e41d98174996b920bbe892648b7b4aa8304f000a6fc14ac586173. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:07Z), 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/USL4R2311047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dadd4d5651c4cffc3f69da635131630262d9d37c93e343b403b806d4025cb28. 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/USL4R2311049.